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); tyro: Named for the Dutch R/V Tyro. More on authors: Randall & Lourie.
Environment: milieu / climate zone / depth range / distribution range
Marine; reef-associated; non-migratory; depth range 43 - 48 m (Ref. 82040). Tropical
Western Indian Ocean: Seychelles.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 6.1 cm TL (female)
Morphology | Morphometrics
(total): 15. This species is distinguished by the following characters: D 15; pectoral rays 14-15; rings on trunk 14; tail 38; subdorsal 3; subdorsal spines 4, forming a square, the dorsal 2 enlarged; spines blunt and moderate in size in trunk and tail ridges; third and seventh superior trunk spines, and fourth, eighth, and eleventh superior tail spines enlarged, with a slender, leaf-like filament; slender body, the maximum trunk depth (at seventh trunk ring) 11.2 in TL; depth of tail at third tail ring 23 in TL; trunk length 3.2 in TL; head at right angle to trunk as photographed (80° in preserved specimen); head length 6.2 in TL; snout length 2.2 in HL; eye diameter 6.25 in HL; suborbital 1, supraorbital 2, and 2 nose spines; coronet oval and cuplike in dorsal view, with a rugose spine to each side, followed by a narrow median ridge; anterior edges of coronet converging to a low, arrow-like, median spine; shoulder ridge continuous middorsally, followed by crest-like ridge; gill opening a single middorsal slit in neck ridge between coronet and collar of shoulder ridge; color when preservative uniform greyish white; when fresh light brown with whitish blotches, grading to light orangish brown posteriorly on tail, and to whitish ventrally on head and trunk; trunk and tail ridge spines white; filaments on spines dark brown. This species differs from H. pusillus in having a much greater head depth, 38 (vs.34) tail rings, and 14 or 15 (vs. 12 or 13) pectoral rays (Ref. 82040).
Collected from coarse calcareous sand and coral (82040).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Male carries the eggs in a brood pouch (Ref. 205).
Randall, J.E. and S. Lourie, 2009. Hippocampus tyro, a new seahorse (Gasterosteiformes: Syngnathidae) from the Seychelles. Smithiana Bulletin 10:19-21. (Ref. 82040)
IUCN Red List Status (Ref. 119314)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00156 - 0.00968), b=2.99 (2.77 - 3.21), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.2 ±0.5 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .