---
title: "Atlantic Lion's Mane Jelly"
description: "Cyanea fulva — Other animals. Cyanea fulva, the Atlantic lion's mane jellyfish, is a species of jellyfish found along the Mid-Atlantic coastal region of the United States."
canonical: https://animalchecklist.com/animal/atlantic-lion-s-mane-jelly
last_updated: 2026-09-20
---

# Atlantic Lion's Mane Jelly

> Cyanea fulva — Other animals. Cyanea fulva, the Atlantic lion's mane jellyfish, is a species of jellyfish found along the Mid-Atlantic coastal region of the United States.

- Scientific name: *Cyanea fulva*
- Category: `other` (Other animals)
- Habitats: `sea` (Sea & coast)
- iNaturalist observations: 2124
- iNaturalist taxon: [1064817](https://www.inaturalist.org/taxa/1064817)

## Names

- en: Atlantic Lion's Mane Jelly

## Countries with the most observations

US (1003), CA (30)

## Summary

Cyanea fulva, the Atlantic lion's mane jellyfish, is a species of jellyfish found along the Mid-Atlantic coastal region of the United States. C. fulva are commonly noted as being about two inches in diameter and smaller than C. capillata, however, larger than C. versicolor, a co-occurring close species. One distinctive feature present in mature C. fulva populations is their four mouth-part tentacles, containing a cinnamon color with the center of the main cavity being darker. At a young age, these jellyfish can have three appendages but often gain a fourth at more developed life cycle stages. C. fulva are also known…

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

## Photo

![Atlantic Lion's Mane Jelly](https://animalchecklist.com/img/animals/atlantic-lion-s-mane-jelly/medium.jpg)

Photo: Christine Stone · CC0 · inaturalist — https://www.inaturalist.org/observations/117722119

## Machine access

`GET https://animalchecklist.com/api/v1/animals/atlantic-lion-s-mane-jelly?lang=en` — see [openapi.json](https://animalchecklist.com/openapi.json).