---
title: "Pacific Sleeper Shark"
description: "Somniosus pacificus — Pesci. The Pacific sleeper shark (Somniosus pacificus) is a shark of the family Somniosidae, the sleeper sharks."
canonical: https://animalchecklist.com/it/animal/pacific-sleeper-shark
last_updated: 2026-09-20
---

# Pacific Sleeper Shark

> Somniosus pacificus — Pesci. The Pacific sleeper shark (Somniosus pacificus) is a shark of the family Somniosidae, the sleeper sharks.

- Scientific name: *Somniosus pacificus*
- Category: `fish` (Pesci)
- Habitats: `sea` (Mare e costa)
- iNaturalist observations: 20
- Wikidata: [Q533894](https://www.wikidata.org/wiki/Q533894)
- iNaturalist taxon: [112842](https://www.inaturalist.org/taxa/112842)

## Names

- en: Pacific Sleeper Shark
- de: Pazifischer Schlafhai
- es: Tiburón dormilón del Pacífico
- fr: Laimargue du Pacifique
- nl: Pacifische sluimerhaai

## Summary

The Pacific sleeper shark (Somniosus pacificus) is a shark of the family Somniosidae, the sleeper sharks. While primarily associated with temperate and subarctic waters of the Northern Pacific Ocean, it has been documented in the tropical Pacific and Antarctic Ocean as well. Reaching lengths of 4.65 m (15.3 ft), it is one of the world's largest predatory sharks. It is highly adapted to the extreme temperature and pressures of the deep-sea, including specialized liver oils and high concentrations of urea and trimethylamine oxide for survival. The sleeper shark has a sluggish reputation, but is also a versatile hunter…

Text: Wikipedia (en), CC BY-SA 4.0 — https://en.wikipedia.org/wiki/Pacific_sleeper_shark

## Photo

![Pacific Sleeper Shark](https://animalchecklist.com/img/animals/pacific-sleeper-shark/medium.jpg)

Photo: National Oceanic and Atmospheric Administration, 알려진 저작권 제한 없음 (퍼블릭 도메인) · Public domain · inaturalist — https://www.inaturalist.org/taxa/112842

## Machine access

`GET https://animalchecklist.com/api/v1/animals/pacific-sleeper-shark?lang=it` — see [openapi.json](https://animalchecklist.com/openapi.json).