Hydrichthella epigorgia

Amazing fact

Some finger-like polyps of Hydrichthella epigorgia have a swollen tip and no tentacles.

Hydrichthella epigorgia in its habitat (illustration)

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An illustration based on the real animal.

A little discovery to share.

Its polyps have different jobs, such as catching food, defending and reproducing, and their shapes differ greatly by job.

Source鳥羽水族館 — ハナヤギウミヒドラ

THE REAL WORLD

The real Hydrichthella epigorgia

Scientific name: Hydrichthella epigorgia
Japanese name: ハナヤギウミヒドラ
Group: Ocean animals

Class: Hydrozoa
Order: Anthoathecata
Family: Ptilocodiidae
Genus: Hydrichthella

Facts about the real animal.

A hydroid that lives in the seas south of Sagami Bay.

鳥羽水族館 — ハナヤギウミヒドラ

It lives together with the hanayagi sea fan, on the surface of its branches.

鳥羽水族館 — ハナヤギウミヒドラ

Its polyps have different jobs, such as catching food, defending and reproducing, and their shapes differ greatly by job.

鳥羽水族館 — ハナヤギウミヒドラ

How the Hydrichthella epigorgia lives

Its root-like parts attach in the gaps between the sea fan’s polyps, filling the spaces. New polyps arise from these root-like parts. Reproductive polyps bear reproductive bodies on short stalks low down.

公益財団法人黒潮生物研究所

Basic data

Range: Sagami Bay and southward

鳥羽水族館

Where the Hydrichthella epigorgia has been recorded

Records: GBIF.org (CC0 and CC BY 4.0 records, retrieved 2026-11-07). Map: Natural EarthSee the records on GBIF

Where it livesJapan Ocean

Watch wild animals from a distance. Do not touch or feed them, and take care of the places where they live.

Names around the world

日本語: ハナヤギウミヒドラ
한국어: 꽃총산호히드라

Names come from Wikidata and iNaturalist records. Where a language has no recorded name, we use the scientific name.

Sources and how we check

鳥羽水族館 — ハナヤギウミヒドラChecked: 2026-11-04
公益財団法人黒潮生物研究所 — ハナヤギウミヒドラChecked: 2026-11-09

We check each fact against its source. The illustrations simplify how the real animal looks.

The classification (class, order, family, genus) follows Wikidata records, checked against GBIF. Classifications can change as research goes on.

The basic data are the values given in each source. They vary with how the animal is measured, whether it is male or female, and whether it lives in the wild or in captivity.

This page was translated from the original Japanese with the help of AI.

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