---
title: "Christmas Tree Hydroid"
description: "Pennaria disticha — Inne zwierzęta. Pennaria disticha, also known as the Christmas tree hydroid, is a species of athecate hydroid in the family Pennariidae."
canonical: https://animalchecklist.com/pl/animal/christmas-tree-hydroid
last_updated: 2026-09-20
---

# Christmas Tree Hydroid

> Pennaria disticha — Inne zwierzęta. Pennaria disticha, also known as the Christmas tree hydroid, is a species of athecate hydroid in the family Pennariidae.

- Scientific name: *Pennaria disticha*
- Category: `other` (Inne zwierzęta)
- Habitats: `sea` (Morze i wybrzeże)
- iNaturalist observations: 2709
- Wikidata: [Q2591429](https://www.wikidata.org/wiki/Q2591429)
- iNaturalist taxon: [195464](https://www.inaturalist.org/taxa/195464)

## Names

- en: Christmas Tree Hydroid
- de: Weihnachtsbaum-Hydrozon
- fr: Hydraire des amarres

## Countries with the most observations

GR (326), ES (181), AU (131), IN (96), MX (82), US (60), EC (43), KY (36), IT (34), FR (30), JM (25), MQ (25)

## Summary

Pennaria disticha, also known as the Christmas tree hydroid, is a species of athecate hydroid in the family Pennariidae. Colonies are common in the Mediterranean Sea growing on rocks close to the surface. This species has been used in research into prey capture.

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

## Photo

![Christmas Tree Hydroid](https://animalchecklist.com/img/animals/christmas-tree-hydroid/medium.jpg)

Photo: Erica Krimmel · CC0 · inaturalist — https://www.inaturalist.org/observations/3811989

## Machine access

`GET https://animalchecklist.com/api/v1/animals/christmas-tree-hydroid?lang=pl` — see [openapi.json](https://animalchecklist.com/openapi.json).