Hippocampus semispinosus  Kuiter, 2001

Half-spined seahorse
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Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Syngnathiformes (Pipefishes and seahorses) > Syngnathidae (Pipefishes and seahorses) > Hippocampinae
Etymology: Hippocampus: Greek, ippos = horse + Greek,kampe = curvature (Ref. 45335);  semispinosus: Named in reference to its spiny appearance that is intermediate between smooth and long-spined species.

Environment / Climate / Range Ecology

Marine; demersal; depth range 40 - 60 m (Ref. 58018).   Tropical

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 18.0 cm OT male/unsexed; (Ref. 48635)

Short description Morphology | Morphometrics

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 intermittently on trunk rings just above inferior ridge, extending onto tail to 17th-18th ring (Ref. 42735). Males dull yellowish brown with a series of distinctive white blotches on the trunk; females yellow or cream to reddish brown with broad saddle like banding behind the head and near dorsal fin (Ref. 48635).

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

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. Also from Australia (questionable occurrence, Ref. 75154).

Biology     Glossary (e.g. epibenthic)

Found on shallow coastal habitats, from near mangroves to deeper muddy channels, or deep offshore where known from trawls (Ref. 48635). Often with algae growth on the spiny ridges (Ref. 48635). Ovoviviparous (Ref. 205). The male carries the eggs in a brood pouch which is found under the tail (Ref. 205).

Main reference Upload your references | References | Coordinator | Collaborators

Kuiter, R.H., 2001. Revision of the Australian seahorses of the genus Hippocampus (Syngnathiformes: Syngnathidae) with descriptions of nine new species. Rec. Aus. Mus. 53:293-340. (Ref. 42735)

IUCN Red List Status (Ref. 90363)

CITES (Ref. 94142)

Threat to humans

  Harmless




Human uses

FAO(Publication : search) | FisheriesWiki |

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Internet sources

BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | iSpecies | PubMed | Scirus | SeaLifeBase | Tree of Life | uBio | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00676 (0.00242 - 0.01892), b=2.93 (2.69 - 3.17), based on LWR estimates for this Subfamily-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.4   ±0.5 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278):  .
Vulnerability (Ref. 59153):  Low vulnerability (13 of 100) .
Price category (Ref. 80766):   Unknown.