Asian Small-clawed Otterコツメカワウソ

Aonyx cinereusVU— Vulnerable

The Asian small-clawed otter is the smallest otter species in the world, native to wetlands and mangroves across South and Southeast Asia. Highly social and vocal, it typically lives in family groups of up to a dozen or more individuals and feeds mainly on crabs and other small aquatic prey. It is classified as Vulnerable by the IUCN and has been listed on CITES Appendix I since 2019, reflecting mounting pressure from habitat loss and the illegal pet trade.

Asian Small-clawed Otter (reference photo)
Photo: Animalculum / CC BY 4.0 / Source / cropped

Species Data

Classification
Carnivora / Mustelidae Source
Distribution
Found across South and Southeast Asia—including India, Nepal, Bangladesh, Bhutan, southern China, Myanmar, Laos, Thailand, Cambodia, Vietnam, Malaysia, Indonesia, and the Philippines—in wetlands, mangroves, and rice paddies. Source

Did You Know?

  • It is the smallest of the world's otter species, and its tiny, blunt claws—which barely extend past the fleshy pads of its digits—give the species its English and Japanese names. Source
  • Highly social, small-clawed otters live in groups of up to 15 individuals and communicate using at least 12 distinct types of vocalizations. Source
  • Since the late 2010s, social-media-driven pet demand has fueled a surge in smuggling; one estimate found that around 70% of otter smuggling cases intercepted in Southeast Asia were destined for Japan, making illegal trade a serious conservation threat behind the species' popularity. Source

Where to See This Species

30 facilities · 10 individuals

How to tell Sea Otters vs. River Otters apart →

サンシャイン水族館 (Sanshain Suizokukan)Tokyo池袋駅(35番出口)からサンシャイン60通りを通って来館。

在籍個体を確認 Source

No.0040In residence

Koko

ここ

Asian Small-clawed OtterAonyx cinereus

Sex
Male
Born
May 27, 2024
VU— Vulnerable
No.0041In residence

Nattsu

なっつ

Asian Small-clawed OtterAonyx cinereus

Sex
Male
Born
May 27, 2024
VU— Vulnerable

しながわ水族館 (Shinagawa Suizokukan)TokyoOpened in 1991

在籍個体を確認 Source

No.0044In residence

Mahalo

マハロ

Asian Small-clawed OtterAonyx cinereus

Sex
Female
Born
August 7, 2014
VU— Vulnerable
No.0045In residence

Momiji

もみじ

Asian Small-clawed OtterAonyx cinereus

Sex
Female
Born
October 30, 2018
VU— Vulnerable

東武動物公園 (Toubu Doubutsu Kouen)Saitama東武動物公園駅(西口)下車、徒歩10分(600m)またはバス約5分。

在籍個体を確認 Source

No.0046In residence

Himari

ひまり

Asian Small-clawed OtterAonyx cinereus

Sex
Female
Born
February 1, 2021
VU— Vulnerable

Toba AquariumMieOpened in 1955

在籍個体を確認 Source

No.0057In residence

Mabo

マーボー

Asian Small-clawed OtterAonyx cinereus

Sex
Male
Born
Unknown
VU— Vulnerable

Osaka Aquarium KaiyukanOsakaOpened in 1990

在籍個体を確認 Source

No.0062In residence

Miu

ミウ

Asian Small-clawed OtterAonyx cinereus

Sex
Male
Born
August 17, 2018
VU— Vulnerable
No.0063In residence

Buna

ブナ

Asian Small-clawed OtterAonyx cinereus

Sex
Male
Born
August 23, 2023
VU— Vulnerable
No.0064In residence

Shii

シイ

Asian Small-clawed OtterAonyx cinereus

Sex
Female
Born
August 23, 2023
VU— Vulnerable
No.0065In residence

Popo

ポポ

Asian Small-clawed OtterAonyx cinereus

Sex
Unknown
Born
around 2019
VU— Vulnerable

アドベンチャーワールド (Adobencha World)WakayamaOpened in 1978

アドベンチャーワールドのWikipedia記事に飼育種として記載 Source

さいたま水族館 (Saitama Suizokukan)Saitama東武伊勢崎線羽生駅または加須駅からタクシーで約15分(約7km)。

さいたま水族館のWikipedia記事に飼育種として記載 Source

とくしま動物園 (Tokushima Doubutsuen)Tokushima

とくしま動物園のWikipedia記事に飼育種として記載 Source

ノースサファリサッポロ (Nosusafarisapporo)Hokkaido

ノースサファリサッポロのWikipedia記事に飼育種として記載 Source

のとじま臨海公園水族館 (Notojimarinkai Kouen Suizokukan)Ishikawa最寄り駅は和倉温泉駅。

のとじま臨海公園水族館のWikipedia記事に飼育種として記載 Source

越前松島水族館 (Echizenmatsushima Suizokukan)FukuiOpened in 1959

越前松島水族館のWikipedia記事に飼育種として記載 Source

宮島水族館 (Miyajima Suizokukan)HiroshimaOpened in 2011

宮島水族館のWikipedia記事に飼育種として記載 Source

京急油壺マリンパーク (Keikyuuaburatsubomarin Park)KanagawaOpened in 1968

京急油壺マリンパークのWikipedia記事に飼育種として記載 Source

桂浜水族館 (Katsurahama Suizokukan)KochiOpened in 1931

桂浜水族館のWikipedia記事に飼育種として記載 Source

高知県立のいち動物公園 (Kouchi Kenritsu Noichi Doubutsu Kouen)Kochi土佐くろしお鉄道ごめん・なはり線「のいち駅」から徒歩20分またはレンタサイクル13分。

高知県立のいち動物公園のWikipedia記事に飼育種として記載 Source

埼玉県こども動物自然公園 (Saitamakenkodomodoubutsu Shizen Kouen)SaitamaOpened in 1980

埼玉県こども動物自然公園のWikipedia記事に飼育種として記載 Source

札幌市円山動物園 (Sapporoshimaruyama Doubutsuen)HokkaidoOpened in 1951

札幌市円山動物園のWikipedia記事に飼育種として記載 Source

市川市動植物園 (Ichikawashi Doushokubutsuen)Chiba所在地は千葉県市川市大町284番地1。

市川市動植物園のWikipedia記事に飼育種として記載 Source

Hirakawa ZooKagoshimaJR指宿枕崎線「五位野駅」から徒歩約20分、またはバスで「福平農協前」から「谷山・動物園行き」に乗車し終点下車。

鹿児島市平川動物公園のWikipedia記事に飼育種として記載 Source

周南市徳山動物園 (Shuunanshitokuyama Doubutsuen)YamaguchiOpened in 1960

周南市徳山動物園のWikipedia記事に飼育種として記載 Source

小樽水族館 (Otaru Suizokukan)HokkaidoOpened in 1958

小樽水族館のWikipedia記事に飼育種として記載 Source

新さっぽろサンピアザ水族館 (Shinsapporosanpiaza Suizokukan)Hokkaido札幌市営地下鉄東西線「新さっぽろ」駅から徒歩約5分、JR千歳線「新札幌」駅から徒歩約3分。

新さっぽろサンピアザ水族館のWikipedia記事に飼育種として記載 Source

新屋島水族館 (Shinyashima Suizokukan)KagawaOpened in 1969

新屋島水族館のWikipedia記事に飼育種として記載 Source

千葉市動物公園 (Chibashi Doubutsu Kouen)ChibaOpened in 1985

千葉市動物公園のWikipedia記事に飼育種として記載 Source

Nagasaki Bio ParkNagasakiOpened in 1980

長崎バイオパークのWikipedia記事に飼育種として記載 Source

長野市茶臼山動物園 (Naganoshichausuyama Doubutsuen)NaganoJR篠ノ井駅が最寄り駅。

長野市茶臼山動物園のWikipedia記事に飼育種として記載 Source

浜松市動物園 (Hamamatsushi Doubutsuen)ShizuokaOpened in 1950

浜松市動物園のWikipedia記事に飼育種として記載 Source

福岡市動物園 (Fukuokashi Doubutsuen)FukuokaOpened in 1953

福岡市動物園のWikipedia記事に飼育種として記載 Source

Higashiyama Zoo and Botanical GardensAichiOpened in 1937

名古屋市東山動物園のWikipedia記事に飼育種として記載 Source

Latest news

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Transferred or Residency Unconfirmed

No.0039Status pending

Raja

ラジャ

Asian Small-clawed OtterAonyx cinereus

サンシャイン水族館 (Sanshain Suizokukan)

Sex
Male
Born
June 5, 2015
VU— Vulnerable
No.0043Status pending

Yamato

やまと

Asian Small-clawed OtterAonyx cinereus

サンシャイン水族館 (Sanshain Suizokukan)

Sex
Male
Born
April 22, 2013
VU— Vulnerable
No.0047Status pending

Taiyou

たいよう

Asian Small-clawed OtterAonyx cinereus

マクセル アクアパーク品川 (Makuseruakua Park Shinagawa)

Sex
Male
Born
August 12, 2014
VU— Vulnerable
No.0048Status pending

Mitsuba

みつば

Asian Small-clawed OtterAonyx cinereus

マクセル アクアパーク品川 (Makuseruakua Park Shinagawa)

Sex
Female
Born
August 19, 2012
VU— Vulnerable
No.0049Status pending

Kiwa

キワ

Asian Small-clawed OtterAonyx cinereus

Toba Aquarium

Sex
Female
Born
October 28, 2016
VU— Vulnerable
No.0050Status pending

Asahi

アサヒ

Asian Small-clawed OtterAonyx cinereus

Toba Aquarium

Sex
Male
Born
September 18, 2011
VU— Vulnerable
No.0051Status pending

Hana

はな

Asian Small-clawed OtterAonyx cinereus

Toba Aquarium

Sex
Female
Born
January 12, 2022
VU— Vulnerable
No.0052Status pending

Soboro

そぼろ

Asian Small-clawed OtterAonyx cinereus

Toba Aquarium

Sex
Male
Born
June 28, 2022
VU— Vulnerable
No.0053Status pending

Okaka

おかか

Asian Small-clawed OtterAonyx cinereus

Toba Aquarium

Sex
Male
Born
June 28, 2022
VU— Vulnerable
No.0054Status pending

Konbu

こんぶ

Asian Small-clawed OtterAonyx cinereus

Toba Aquarium

Sex
Male
Born
June 28, 2022
VU— Vulnerable
No.0055Status pending

Ren

れん

Asian Small-clawed OtterAonyx cinereus

Toba Aquarium

Sex
Male
Born
May 23, 2023
VU— Vulnerable
No.0056Status pending

Tsukushi

つくし

Asian Small-clawed OtterAonyx cinereus

Toba Aquarium

Sex
Female
Born
May 24, 2023
VU— Vulnerable
No.0060Status pending

Gumi

グミ

Asian Small-clawed OtterAonyx cinereus

Osaka Aquarium Kaiyukan

Sex
Unknown
Born
January 2, 2012
VU— Vulnerable
No.0061Status pending

Biju

ビジュ

Asian Small-clawed OtterAonyx cinereus

Osaka Aquarium Kaiyukan

Sex
Male
Born
Unknown
VU— Vulnerable
No.0066Status pending

Shuro

シュロ

Asian Small-clawed OtterAonyx cinereus

Osaka Aquarium Kaiyukan

Sex
Unknown
Born
August 29, 2009
VU— Vulnerable
No.0067Status pending

Nira

ニラ

Asian Small-clawed OtterAonyx cinereus

Osaka Aquarium Kaiyukan

Sex
Unknown
Born
August 29, 2009
VU— Vulnerable
No.0068Status pending

Zakuro

ザクロ

Asian Small-clawed OtterAonyx cinereus

Osaka Aquarium Kaiyukan

Sex
Unknown
Born
August 29, 2009
VU— Vulnerable

Individuals Remembered

No.0042In memoriam

Miruku

みるく

Asian Small-clawed OtterAonyx cinereus

サンシャイン水族館 (Sanshain Suizokukan)

Sex
Male
Born
May 27, 2024
VU— Vulnerable
No.0058In memoriam

Kibou

キボウ

Asian Small-clawed OtterAonyx cinereus

Toba Aquarium

Sex
Female
Born
Unknown
VU— Vulnerable
No.0059In memoriam

Tsubaki

ツバキ

Asian Small-clawed OtterAonyx cinereus

Osaka Aquarium Kaiyukan

Sex
Female
Born
August 1, 2005
VU— Vulnerable

FAQ

Why is it called the small-clawed otter?
Its claws are much smaller and blunter than those of other otter species, barely projecting past the fleshy pads of its toes—a distinctive trait reflected in both its English and Japanese names. Source
Is the small-clawed otter endangered?
It is listed as Vulnerable on the IUCN Red List, with numbers estimated to have declined around 30% over the past three decades, and it was moved to CITES Appendix I in 2019 to ban international commercial trade. Source
Why is the pet trade a problem for this species?
Social-media popularity in Japan and elsewhere has driven strong demand for pet otters since the late 2010s, and a large share of otters smuggled out of Southeast Asia have reportedly been destined for the Japanese market, putting additional pressure on wild populations. Source

Source: sunshinecity.jp www.aquarium.gr.jp prtimes.jp