---
title: "California Aglaja"
description: "Navanax inermis — Other animals. Navanax inermis, common name the California aglaja, is a large species of predatory sea slug, a marine opisthobranch gastropod mollusk in the family Aglajidae."
canonical: https://animalchecklist.com/animal/california-aglaja
last_updated: 2026-09-20
---

# California Aglaja

> Navanax inermis — Other animals. Navanax inermis, common name the California aglaja,  is a large species of predatory sea slug, a marine opisthobranch gastropod mollusk in the family Aglajidae.

- Scientific name: *Navanax inermis*
- Category: `other` (Other animals)
- Habitats: `sea` (Sea & coast)
- iNaturalist observations: 5340
- Wikidata: [Q3173679](https://www.wikidata.org/wiki/Q3173679)
- iNaturalist taxon: [49848](https://www.inaturalist.org/taxa/49848)

## Names

- en: California Aglaja
- es: Aglaja californiana

## Countries with the most observations

US (5137), MX (79)

## Summary

Navanax inermis, common name the California aglaja,  is a large species of predatory sea slug, a marine opisthobranch gastropod mollusk in the family Aglajidae. Navanax is not a nudibranch, even though it somewhat resembles one; it belongs to a more ancient lineage of opisthobranchs called the cephalaspideans or head shield slugs and snails.

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

## Photo

![California Aglaja](https://animalchecklist.com/img/animals/california-aglaja/medium.jpg)

Photo: Chris Spain · CC0 · inaturalist — https://www.inaturalist.org/observations/230285051

## Machine access

`GET https://animalchecklist.com/api/v1/animals/california-aglaja?lang=en` — see [openapi.json](https://animalchecklist.com/openapi.json).