New 🐟 Mercury Safety Guide & Omega-3 Rankings Updated for 2026. View Omega-3 Rankings →

🌊 Marine Data Deficient 🐠 Aquarium 🌡️ Subtropical

Beibu Bay seahorse

Hippocampus casscsio Zhang, Qin, Wang & Lin, 2016
Max Length
13.3 cm
Max Weight
-
Lifespan
-
Trophic Level
3.4
Depth
-
Climate
Subtropical
Resilience
High
Vulnerability
15.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Beibu Bay seahorse (Hippocampus casscsio) is a ray-finned fish of the family Syngnathidae. It inhabits marine (saltwater) waters in reef-associated environments. This species can reach a maximum total length of 13.3 cm. With a trophic level of 3.4, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Data Deficient on the IUCN Red List.

Scientific Name
Hippocampus casscsio
Authority
Zhang, Qin, Wang & Lin, 2016
Habitat
Marine
Climate
Subtropical
Body Shape
Elongated
IUCN Status
DD
Max Length
13.3 cm
Trophic Level
3.4
Resilience
High
Vulnerability
15.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal soft rays (total): 16. This species is distinguished from other seahorse species by the following set set of characters: high number of tail rings (34-37); pectoral-fin rays 15; dorsal-fin rays 16, with dorsal fins covering 2 trunk rings and 2 tail rings; a rounded nuchal plate without a raised coronet; snout length approximately 30% in HL; an eye spine; 2 cheek spines; tail length approximately 60% in SL; body colour plain dark brown; males with fully enclosed brood pouch with a small opening for the incubation of eggs .: elongated; Cross section: angular.

🌀 Behaviour

Behavioural data for Beibu Bay seahorse is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous 📦 Batch Spawner
Spawning Season
spring-summer
Spawn Location
Pelagic
Fertilization
External

🌍 Habitat & Distribution

Marine; reef-associated. Subtropical; 22°S - 18°S, 107°E - 111°E Northwest Pacific: China.

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
3.4±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.00447 × L3 (TL)
Max TL
13.3cm
Dorsal Rays
16

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Data Deficient
Assessment Date
2017

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
15.00/100
Low vulnerability
Trophic Level
3.4
Predator
Body Shape
Elongated
Climate Zone
Subtropical
Described By
Zhang, Qin, Wang & Lin, 2016

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Beibu Bay seahorse ↗
Suggest an Edit

Spotted incorrect or outdated data? Submit a correction and our editorial team will review it. Approved edits go live within 48 hours.

Link to a scientific paper, FishBase, or other authoritative source
Report an Issue

Found a factual error, broken data, or inappropriate content? Let us know and we will investigate promptly.