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Big-bellied seahorse (Hippocampus abdominalis) — Syngnathidae

Big-bellied seahorse

Hippocampus abdominalis
Family: Syngnathidae

The Big-bellied seahorse (Hippocampus abdominalis) is a brackish-water fish of the family Syngnathidae that grows up to 35 cm.

Length
35 cm
Water
Brackish
Depth
0.0–104.0 m
Diet
Carnivore
Body shape
Irregular
Substrate
Sand / mud bottom
Danger
Harmless
Range
Oceania: Australia, New Zealand

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Description

The Big-bellied seahorse is a seahorse (Syngnathidae) from coastal waters of southeastern Australia and New Zealand. The species grows to about 35 cm and has an upright body armoured in bony rings with a horse-like head, a prehensile tail and a tubular snout. It is one of the largest seahorses, with a conspicuously rounded belly and a yellow-brown, mottled body. It swims slowly and clings with its tail to weed, coral or seagrass and sucks in minute crustaceans. The male carries the eggs in a pouch. The fish is harmless to humans.

Frequently asked questions

How do you recognise the Big-bellied seahorse?

The Big-bellied seahorse has an irregular in shape body and is mainly yellow-gold.

Where does the Big-bellied seahorse live?

The Big-bellied seahorse lives in brackish water and is mostly found around sand or mud bottom. Oceania: Australia, New Zealand

How big does the Big-bellied seahorse get?

The Big-bellied seahorse grows to a maximum of about 35 cm. On average the species is around 18 cm.

Is the Big-bellied seahorse dangerous to humans?

No, the Big-bellied seahorse is harmless to humans. This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status.

More photos

Big-bellied seahorse (Hippocampus abdominalis) — Syngnathidae — 2
iNaturalist ((c) imogenisunderwater, some rights reserved (CC BY-NC))
Big-bellied seahorse (Hippocampus abdominalis) — Syngnathidae — 3
iNaturalist ((c) Henrick Michael, some rights reserved (CC BY-NC))
Big-bellied seahorse (Hippocampus abdominalis) — Syngnathidae — 4
Wikimedia Commons — Fernando Losada Rodríguez (CC BY-SA 4.0)
Big-bellied seahorse (Hippocampus abdominalis) — Syngnathidae — 5
Wikimedia Commons — Fernando Losada Rodríguez (CC BY-SA 4.0)
Fin

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All data

Identification

English name
Big-bellied seahorse sourced
Scientific name
Hippocampus abdominalis
Family
Syngnathidae
Other names
Bigbelly seahorse; Big-belly seahorse; Eastern potbelly seahorse; Pot-bellied seahorse verified

Appearance

Size class
Medium verified
Max length (cm)
35.0 verified
Average length (cm)
18.0 verified
Body shape
Irregular sourced
Dominant colour
Yellow / gold sourced
Tail shape
Rounded inferred

Habitat & distribution

Water type
Brackish sourced
Substrate
Sand / mud bottom sourced
Min depth (m)
0.0 verified
Max depth (m)
104.0 verified
Natural range
Oceania: Australia, New Zealand sourced
Origin
Native inferred

Behaviour & biology

Diet
Carnivore inferred
Diet (detail)
Small fishes, crustaceans and invertebrates inferred
Territorial
No inferred
Reproduction
Separate sexes inferred
Sexual dimorphism
Yes inferred
Seasonality
Present year-round in its habitat; no pronounced seasonality known. inferred

For anglers

Fishing method
Bottom fishing with natural bait (worm, shrimp or fish) on or just above the seabed. inferred
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Harmless verified
First aid
This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status. verified

Status & sources

Sources
FishBase via GBIF (DwC-A), CC-BY-NC 4.0

Same genus Hippocampus

More from the family Syngnathidae

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