SPECIMEN No.0041 ・ Aquarium
Nattsuなっつ
Name romanized from Japanese; not an official English name.
Asian Small-clawed OtterAonyx cinereusVU— Vulnerable
Nattsu is an Asian Small-clawed Otter recorded at Sunshine Aquarium. Born May 27, 2024.
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Profile
| Name | Nattsu (なっつ) |
|---|---|
| Species | Asian Small-clawed Otter Aonyx cinereus |
| Sex | Male |
| Born | May 27, 2024 |
| Birth Facility | Sunshine Aquarium |
| Current Facility | Sunshine Aquarium（Tokyo） |
| Enclosure | マリンガーデン カワウソたちの水辺 |
| Status | In residence |
| Conservation Status (IUCN) | VU— Vulnerable |
Timeline
- May 27, 2024 Birth Sunshine Aquarium Source
Records
Born around 10:30 a.m. on May 27, 2024, as one of three brothers to father Raja and mother Mahalo. Mahalo began showing signs of labor around 9:00 a.m., and Raja was also seen holding the pups. The parents cared for the pups together, licking their bodies to encourage them to relieve themselves, and Raja carried in straw for nesting material that Mahalo arranged in the nest. A health check at 9 days old found that all three were male.
In a first for the aquarium, the three brothers' names were chosen by first narrowing six staff-proposed candidates to three by online vote, then on September 16, 2024, letting the otters themselves pick slips of paper from a fortune-drawing-style display, which settled on 'Koko,' 'Nattsu,' and 'Miruku.' The names refer to the coconut palms that grow in the species' native habitat.
By a little over three months old, all three had grown to 1.2 to 1.3 kg and were eating about 200 g a day of fish such as rainbow trout and loach and crustaceans such as shrimp. The pups were also observed picking up straw that their father Raja had gathered for nest-building and carrying it along with him.
Family
FAQ
- Where can I meet Nattsu?
- Nattsu is recorded at Sunshine Aquarium in Tokyo (last verified: 2026-07-06).
- When was Nattsu born?
- Nattsu was born May 27, 2024.
- What does Nattsu’s record tell us?
- Nattsu is recorded as born on May 27, 2024. The record at Sunshine Aquarium was last verified on 2026-07-06.
Last verified: ／ Source: co.sunshinecity.co.jp prtimes.jp