---
title: "Opalescent Nudibranch"
description: "Hermissenda opalescens — Altri animali. Hermissenda opalescens, also known as the opalescent nudibranch or opalescent sea slug, is a species of brightly coloured sea slug or nudibranch, a marine gastropod mollusc in the family Facelinidae."
canonical: https://animalchecklist.com/it/animal/opalescent-nudibranch
last_updated: 2026-09-20
---

# Opalescent Nudibranch

> Hermissenda opalescens — Altri animali. Hermissenda opalescens, also known as the opalescent nudibranch or opalescent sea slug, is a species of brightly coloured sea slug or nudibranch, a marine gastropod mollusc in the family Facelinidae.

- Scientific name: *Hermissenda opalescens*
- Category: `other` (Altri animali)
- Habitats: `sea` (Mare e costa)
- iNaturalist observations: 21762
- Wikidata: [Q25000955](https://www.wikidata.org/wiki/Q25000955)
- iNaturalist taxon: [494603](https://www.inaturalist.org/taxa/494603)

## Names

- en: Opalescent Nudibranch

## Countries with the most observations

US (21450), MX (42), CA (11)

## Summary

Hermissenda opalescens, also known as the opalescent nudibranch or opalescent sea slug, is a species of brightly coloured sea slug or nudibranch, a marine gastropod mollusc in the family Facelinidae.

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

## Photo

![Opalescent Nudibranch](https://animalchecklist.com/img/animals/opalescent-nudibranch/medium.jpg)

Photo: Alex Heyman · CC0 · inaturalist — https://www.inaturalist.org/observations/105651774

## Machine access

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