Half-spined seahorse (Hippocampus semispinosus) fish species and information / pictures of Half-spined seahorse - Hippocampus semispinosus

Half-spined seahorse (Hippocampus semispinosus) fish species information

Scientific Name
Hippocampus semispinosus

Common Name
Half-spined seahorse

Biology
Dorsal spines (total): 0; Dorsal soft rays (total): 18; Anal spines: 0; Anal soft rays: 4. Trunk rings 11; tail rings 35-36; subdorsal spines 3/0,1,0-0.5, usually enlarged on 11th trunk ring; nose ridge with straight profile and no spine; spine above eye small, length less than eye diameter, angled back; lateral head spine large, about twice in size of eye-spine and recurving; small spine behind eye, placed high above eye center; coronet well developed, with 5-7 diverging blunt spines with rugose tips, posterior spines enlarged and recurving; upper shoulder-ring spine long, situated at gill opening; lower shoulder-ring spine moderately large, with a poorly developed second spine anteriorly; superior trunk and tail ridges with rugose tubercles, enlarged on 1st and 7th rings as broad spines; superior tail ridge with spines of moderate length from 2nd to about 15th ring, somewhat enlarged on 5th and 8th ring, becoming gradually shorter posteriorly; lateral line with pores i

Classification

Classified By
Kuiter, 2001
Class
Ray-finned fishes (Actinopterygii)
Order
Pipefishes and Seahorses (Syngnathiformes)
Family
Pipefishes and seahorses (Syngnathidae)

Distribution

Region
Western Central Pacific
Distribution
Western Central Pacific: Indonesia. International trade is monitored through a licensing system (CITES II, since 5.15.04) and a minimum size of 10 cm applies.
Range
Unknown

Environment

Climate
Tropical
Water Temperature From
Unknown °C
Water Temperature To
Unknown °C
Depth From - meters
40 m
Depth To - meters
60 m
Zone
demersal
Environment
Marine; demersal; depth range 40 - 60 m (Ref. 58018)
Trophic Level
3.44 s.e. 0.52 Based on size and trophs of closest relatives
Occurs in Marine / Salt water
True
Occurs in Brackish water
False
Occurs in Fresh Water
False
Occurs on Reefs
False
Is kept in Aquariums
False

Physical Size and Genetics

Maximum Length
18.0 cm
Common Length
Unknown cm
Phylogenetic Diversity Index
PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses
Unknown
Vulnerability
Low vulnerability (12 of 100)
Resilience
High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)
Threat To Humans
  Harmless
IUCN Red List Status
  Not Evaluated