Can you keep an otter as a pet? An updated explanation of its characteristics, ecology, and habitat. Animals found in aquariums and zoos.

Can you keep a pet otter that is capricious and only pays attention to you when you are in a good mood? We will explain its characteristics, ecology, and habitat. They are the smallest of the otter family, and live in small rivers in Africa, and many families keep them as pets, but they are actually designated as an endangered species.

What is a long-tailed otter? About basic status

The long-tailed otter is a mammal belonging to the class Mammalia, order Carnivora, family Mustelidae, genus Long-tailed otter. The scientific name is Aonyx capensis. The body length is 76.2 – 88 cm, the tail length is 46.5 – 51.5 cm, the body height is 20 cm, and the weight is 11.5 – 21 kg. The information will look like this:

Japanese（和名）	ツメナシカワウソ
English（英名）	Cape clawless otter African clawless otter
scientific name(学名)	Aonyx capensis
classification（分類）	Mammalia、 Carnivora、Mustelidae、Aonyx 哺乳綱、食肉目、イタチ科、ツメナシカワウソ属
IUCN Status(保全状況)	NEAR THREATENED
Length（体長）	76.2 – 88cm
Weight（体重）	11.5 – 21kg

What are the roots and origins of the clawless otter?

The name “clawless otter” generally refers to the African clawless otter (note: the Asian small-clawed otter is a different species). Its roots and origins are understood as follows:

Roots in the weasel family

The clawless otter is a mammal belonging to the family Mustelidae (the weasel family).

Current genetic analysis suggests the following:

Ancestors of the Mustelidae family appeared approximately 25 to 30 million years ago.

Subsequently, a lineage adapted to life near water evolved into the group known as otters.

By about 5 to 10 million years ago, the ancestors of the modern clawless otter had spread to Africa.

Earliest ancestors

The ancestors of otters are believed to have inhabited Eurasia during the Miocene epoch (approximately 23 to 5.3 million years ago).

Early otters were not as specialized for aquatic life as modern ones;

they caught fish near the water’s edge

and lived actively on land as well,

making them semi-aquatic animals.

From there, they acquired:

streamlined bodies

webbed feet

dense, waterproof fur

excellent swimming abilities

Why “clawless”?

The name comes from the characteristics of their forepaws.

The African clawless otter is called “clawless” because:

the claws on its forepaws are extremely small or barely visible

the sense of touch in its fingertips is highly developed

Using these sensitive fingers,

it feels around to locate and catch prey such as

crabs

shrimp

shellfish

frogs

Close relatives

Its closest relatives include:

Asian small-clawed otter (Southeast Asia)

Eurasian otter (Europe and Asia)

Sea otter (marine)

All of these belong to the Mustelidae family.

About classification

The following subspecies exist in the genus Ceratopsium. You can also check other creatures and types on the internet pages and links. I made a list.

Name (名前)	Scientific　Name （学名）	Habit （生息地）
African clawless otter ツメナシカワウソ	Aonyx capensis	Sub-Saharan Africa サブサハラアフリカ
Congo clawless otter ザイールツメナシカワウソ	Aonyx congicus	rainforest of central Africa アフリカ中央部の熱帯雨林
Asian small-clawed otter コツメカワウソ	Aonyx cinereus	South Asia/Southeast Asia 南アジア・東南アジア

Classification class

• 界（Kingdom）：動物界（Animalia）
• 門（Phylum）：脊索動物門（Chordata）
• 綱（Class）：哺乳綱（Mammalia）
• 目（Order）：食肉目（Carnivora）
• 科（Family）：イタチ科（Mustelidae）
• 属（Genus）：Pteronura
• 種（Species）：Pteronura brasiliensis（ツメナシカワウソ / Giant Otter）

About habitat

The long-tailed river otter is widely distributed throughout Africa. Angola, Uganda, Ethiopia, Eritrea, Ghana, Cameroon, Gambia, Guinea, Guinea-Bissau, Kenya, Ivory Coast, Republic of Congo, Democratic Republic of Congo, Zambia, Sierra Leone, Zimbabwe, Sudan, Eswatini, Senegal, Tanzania, Chad, Nigeria, Namibia, Niger, Burkina Faso, Benin, Malawi, South Africa, South Sudan, Mozambique, Liberia, Rwanda, Lesotho, and others.

1. Geographic Distribution

Region: South America

Amazon River Basin: Brazil, Peru, Colombia, Bolivia, Ecuador

Orinoco River Basin: Venezuela, Colombia, Guyana

Distribution Characteristics: Widespread, but locally distributed due to riverine environment

2. Habitat

Freshwater rivers, lakes, and wetlands

Slow-flowing areas with abundant fish and crustaceans

Riverside burrows

Builds burrows on banks and at the bases of fallen trees

Environments with abundant aquatic vegetation

Prefers mangroves and areas with dense aquatic vegetation

Also uses open water

Suitable for foraging, swimming, and schooling

3. Habitat Key Points

Highly dependent on water

Foraging, resting, movement, and social activities all occur near water

Family-based behavior

They form family groups along rivers and lakes, where they cooperate to hunt and use burrows

Vulnerable to human activity

Habitat loss due to river development, poaching, fishing, and deforestation

feature is? What kind of creature is it?

The long-tailed otter lives in freshwater areas. They mainly live alone, but form family groups consisting of pairs and 2-3 young. It got its name from its small claws. It is diurnal, but may be active at night. The back is grayish brown or light blackish brown, and the throat is white or grayish white. The long-tailed otter exhibits strong territorial behavior. Territories are marked by odor secreted by anal glands.

1. Physical Characteristics

Body Size: One of the largest among otters

Body Length: Approximately 1.2–1.8 m (including tail)

Weight: Approximately 22–32 kg

Body Type: Slender and muscular, adapted to aquatic life

Fur Color: Brown to reddish-brown back, light-colored underside

Tail: Flat, used for propulsion while swimming

Limbs: Small, dexterous claws, making them easy to handle prey

2. Behavioral and Personality Characteristics

Highly Social

Live in family groups

Cooperative hunting and burrow management

Playful

Frequent underwater chases and playful interactions

Wary

Sensitive to humans and predators, they quickly flee when they sense danger

3. Ecology & Lifestyle

Perfectly adapted to aquatic life

Forages in rivers, lakes, wetlands, and mangrove forests

Diet: Carnivorous

Food is primarily aquatic organisms such as fish, frogs, shrimp, and crabs

Excellent swimmers and dives

Dives last for about 1-2 minutes

Mostly diurnal

Forages, swims, and builds burrows in the morning and evening

What is your personality like?

Black-crowned otters love to play. Since they require a lot of exercise, it is necessary to give them toys to keep them from getting bored. This animal is suitable for people who want to actively engage in physical contact with their pets, and they also have a very loud sound.

1. Sociality

Living in family groups

Typically, they live in groups of 5-20 individuals, usually consisting of parents, children, or siblings.

They cooperate to hunt and maintain their dens.

Highly Cooperative

Safety and hunting efficiency are ensured through group communication and cooperative behavior.

2. Playful and Curious

Learning through play

Underwater chases, playful interactions, diving practice, etc.

They learn swimming and hunting techniques while playing.

Highly Intelligent

Ability to learn how to catch prey through observation.

3. Vigilance and Timidity

Highly cautious

Sensitive to predators and humans, they will flee when they sense danger.

Although timid, they cooperate with the group to defend themselves.

Although weak as individuals, they ensure safety by acting in groups.

What is the ecology like?

Clawless otters dive from the shore and swim in the water with their webbed feet, watching for prey as they feed on crabs, fish, frogs, crustaceans, shellfish, insects, fish, reptiles, etc. They are viviparous and have a rutting interval of 24-30 days. They can breed all year round. They can give birth to 1-3 pups at a time. They reach sexual maturity in about 1 year, and can live for 13 years in captivity.

1. Habitat

Freshwater-based habitat

Rivers, lakes, wetlands, mangrove forests

Burrow use

Builds burrows on riverbanks or at the base of fallen trees

Family units use these burrows for raising children and resting

Highly dependent on water

Foraging, resting, movement, and social behavior all occur near water

2. Behavior

Diurnal

Foraging, swimming, and burrow construction occur morning to evening

Social

Forms family groups and cooperates in hunting and defense

Communication

Communicates with the group through vocalizations and body movements

3. Diet/Foraging

Mainly carnivorous

Aquatic organisms such as fish, frogs, shrimp, and crabs

Foraging Method

Uses dexterous hands to catch and eat prey

Captures by diving and swimming

Hunts cooperatively

May hunt in schools to chase and hunt fish

4. Reproduction/Rearing

Reproduction: Viviparous

Gestation: Approximately 65 days

Number of cubs born: Usually 2-5

Rearing

Parents cooperate to nurse and feed their young

Raise their young safely in burrows, and they become independent within a few months

Are there any natural enemies?

The natural enemies of the black otter are carnivores that live near water, such as crocodiles.

Diving Behavior of the Clawless Otter

The clawless otter (specifically the African clawless otter) is a semi-aquatic animal inhabiting rivers and lakes, possessing excellent diving capabilities. They frequently dive not only to hunt for fish but also to search for crabs and shellfish on the riverbed.

Dive Duration

Dives typically last between 20 and 40 seconds.

In some cases, they may remain submerged for around one minute.

Unlike marine mammals, they do not stay underwater for extended periods; instead, they forage by repeatedly performing short dives.

Diving Depth

While this varies depending on the habitat:

Depths usually range from 1 to 5 meters.

In deep rivers or lakes, they may dive to depths approaching 10 meters.

They generally swim while exploring the riverbed or searching among the rocks.

Vocalizations of the Clawless Otter

The clawless otter (specifically the African clawless otter) is an animal with a highly expressive nature and a wide variety of vocalizations. While they may sometimes act alone, they use vocal signals to communicate with their mates or offspring.

① High-pitched squeaks or peeps

When a pup calls for its mother

When seeking affection or expressing hunger

Communication between parent and pup

Young otters frequently make particularly high, thin-sounding calls.

② Soft “kuk-kuk” or “chat-chat” sounds

Greetings between companions

Checking each other’s location

Calm, casual communication

These sounds are often heard when the otters are relaxed.

③ Screeches or hisses

Intimidation

Territorial disputes

When sensing danger

These sounds are emitted to show strong wariness toward enemies or intruders.

④ Growling (grrr…)

When angry

When guarding food

Conflicts during the breeding season

A low, rumbling sound used to intimidate others.

Seasonal Activities

The African clawless otter inhabits rivers, lakes, and wetlands across Africa. Rather than the four distinct seasons found in places like Japan, their activity patterns shift in response to the alternation between the rainy and dry seasons.

Rainy Season (High-Water Period)

Activity Characteristics

Rivers and wetlands expand, leading to a wider range of movement.

Prey such as crabs and frogs becomes more abundant, making foraging easier.

They venture into flooded grasslands and wetlands to search for food.

Due to the high water levels, foraging takes place primarily underwater.

Dry Season (Low-Water Period)

Activity Characteristics

Water levels drop, causing prey to congregate near the water’s edge.

They efficiently catch crabs and fish in shallows and pools.

As water sources become limited, their range of movement may become somewhat restricted.

During the dry season, they are frequently seen resting on riverbanks and rocky areas.

Breeding Season

While the breeding season varies by region, in many areas, the rearing of young tends to begin during or immediately after the rainy season.

This is because:

Food is abundant.

The waterside environment is stable.

Conditions are favorable for raising offspring.

Walking Speed

Although the African clawless otter is adapted for an aquatic lifestyle, it can also walk on land without difficulty.

Walking Speed

While few studies have precisely measured their walking speed in the wild, observational records indicate the following characteristics:

Normal walking speed: Approximately 3–5 km/h

When moving hurriedly: Approximately 8–10 km/h

Short-distance running: Estimated to reach speeds of around 10–15 km/h

However, these figures are estimates based on observation; unlike with animals such as cheetahs, their exact top speeds have not been scientifically measured.

Walking Characteristics

They walk in a low-slung posture using all four limbs.

They move with a nimble gait, advancing their front and hind legs alternately.

They can move stably across rocky terrain and muddy ground.

When necessary, they may also move quickly by keeping their bellies close to the ground.

About baby Asian small-clawed otters

This article summarizes the developmental stages, behavioral, and lifestyle characteristics of baby Asian small-clawed otters (Pteronura brasiliensis).

1. Birth and Early Characteristics

Litter Size: Usually 2-5

Weight and Length: Approximately 0.5-1 kg at birth, approximately 30-40 cm in length

Coat Color: Light brown on the back, light brown on the belly

Senses: Eyes open and ears function, but behavior is dependent on the parents

2. Growth and Development

Early Life: Carried and nursed by parents in the burrow

Nursing Period: Approximately 2-3 months

Weaning: Begins learning to eat fish and crustaceans with parents at 2-3 months of age

Motor Skills: Begins swimming and diving practice within the burrow at around 1 month of age

Social Learning: Learns hunting and communication through playful interactions with siblings and parents

3. Behavior & Personality

Playful and active

Playing in burrows and shallow waters improves physical abilities and hunting skills

Highly dependent on parents

Returns to parents when threatened

Acquires cooperation

Learns group life and cooperative behavior with siblings

4. Growth Guidelines

年齢	発達の特徴
0〜1か月	授乳中心、巣穴で過ごす
1〜2か月	巣内で泳ぎ・潜水の練習、親の捕食行動を観察
2〜3か月	離乳開始、親と一緒に採餌練習
3〜6か月	独立性が高まり、群れでの狩りに参加
6か月以降	自力で餌を獲得でき、群れ生活に完全参加

Is the long-tailed otter an endangered species?

Unfortunately, the Japanese otter is listed as an endangered species. Furthermore, international trade is severely restricted by the Washington Convention.

Pests destroying rice fields

As you can see by actually touching the otter, it moves very well. That’s why I love pranks so much. They are sometimes considered pests and are often exterminated by farmers. Habitat destruction due to agricultural land development and deforestation is progressing, and the population is decreasing.

hunting for fur, etc.

They are overhunted for their fur. Furthermore, the black-fronted river otter is also in high demand as a pet, so it is overhunted for this reason as well. The reality is that poaching and smuggling are rampant.

Can you keep a black-tailed otter as a pet?

It is a pet that is extremely difficult to care for. This is because it is designated as an endangered species, and international trade is strictly restricted by the Washington Convention.

What is the average cost of otters?

The average cost of otters is said to be over 1 million yen per animal when converted to Japanese yen. Consider adopting individuals already in the country or those born from such pairs from zoos or aquariums.

Things needed for breeding

What you need for breeding is a room for the otter, a toilet, toys, and food. We recommend a dog or cat cage for the toilet. Small-clawed otters love to play, so toys are a must. The main food should be cat food, and fish and crustaceans should be given as side foods. It would also be nice to have a pool.

Getting used to skinship

Black-fronted river otters have friendly personalities and love physical contact with their owners. They may bite their owners, but be careful not to pull your fingers back as this can cause injury. It has extremely well-developed jaw muscles and is said to have the strength of a large dog. Most of the time it will be a sweet bite, but please be careful.

Be careful of illness

Otters are at risk of parasites, loss of appetite, and diarrhea. In particular, there are cases where the seafood that is fed as food contains parasites. You will need to take measures such as freezing them instead of giving them in the purchased state.