Zebra Seahorse, Hippocampus zebra Whitley 1964


A Zebra Seahorse, Hippocampus zebra, clinging to a crinoid (featherstar) on a sandy bottom at Port Hedland, Western Australia - depth 13 m. Source: Tony Ayling. License: All rights reserved

Summary:

A tropical seahorse with alternating pale and dark zebra-like bands and stripes on the head and body, and often yellow tips on the spines. Lourie et al. (2016) determined that Hippocampus montebelloensis is a junior synonym of H. zebra.


Cite this page as:
Bray, D.J. & Thompson, V.J. 2017, Hippocampus zebra in Fishes of Australia, accessed 18 Nov 2017, http://fishesofaustralia.net.au/Home/species/1539

Zebra Seahorse, Hippocampus zebra Whitley 1964

More Info


Distribution

Exmouth Gulf to Port Hedland, Western Australia, and off Cape Grenville to Northwest Island, Capricorn Group, Queensland. Elsewhere the species occurs in New Guinea. Possibly associated with crinoids, black coral or gorgonians in depths of 20-70 m.

Features

Dorsal fin 17-19; Anal fin 4; Pectoral fin 15-16; trunk rings 11; tail rings 37-39; subdorsal rings 2-3 + 1.
Trunk length slightly more than 1/3 height; tail length about 2/3 height; head length about ¾ trunk length; males with deeper trunk than females, the depth in males is about 80% and in females about 60% head length; length of snout slightly less than half head length.
Subdorsal 3-4/0,1,0-0.5. Spine above eye of moderate length; nape spine small, directed upward; nasal profile straight; 3 small shoulder-ring tubercles or spines, upper two as tubercles, at level of either end of pectoral-fin base, none at gill-opening, lowermost as a small spine; lateral head spine low; trunk tubercles along dorsal and lateral ridges small to moderate in size, some enlarged and pointed, especially beside dorsal fin and on anterior part of superior tail ridges, becoming progressively smaller posteriorly.
Coronet moderately high, with 5 flat spines at apex, posterior 3 directed backward, central spine enlarged.

Lateral line: Lateral line present with pores detectable to about 14th tail ring.

Size


Colour

In life, alternating yellowish-white and brown to black bands, most transverse, some oblique or curved on the head and belly; eye blue with yellowish-white iris; chin yellowish-white, without dark bands; fins lighter; dorsal and anal fins brown proximally; tips of spines often yellow. In preservative - as in life, with alternating bands of white to brownish-white and dark brown to black

Feeding

Like most other seahorses, this species presumably feeds by sucking small prey items such as crustaceans and planktonic zooplankton into its mouth.

Biology

Sexes separate, males brood the eggs in a pouch, and gives birth to tiny independent young. The female uses an ovipositor to transfer her eggs into an elaborate enclosed pouch under the abdomen of the male. The male not only fertilizes the eggs inside the pouch and provides physical protection for the developing embryos, he also osmoregulates and aerates the embryos and may provide some nourishment until the offfspring are born.

Fisheries


Conservation

Listed under Appendix II of the Convention on the International Trade in Endangered Species of Wild Flora and Fauna (CITES). As a result, the species is subject to the Convention, http://www.cites.org/.
Listed as Data Deficient on the 2007 IUCN Red List of Threatened species. http://www.iucnredlist.org/search/details.php/40774/summ
Marine Listed under the Federal Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act 1999). http://www.environment.gov.au/epbc/species/marine.html

Remarks

The zebra-like markings may provide effective camouflage on black coral fans or gorgonians, as the species may mimic black and white basket stars inhabiting these corals.

Similar Species

H. zebra is similar to H. dahli, which has a much lower coronet and the upper tubercle on the shoulder ring is near the gill opening.

Etymology

The specific name zebra refers to the black and white striped markings of this species.

Species Citation

Hippocampus zebra Whitley 1964, Rec. Aust. Mus. 26(5): 164, Pl. 8, off Gillett Cay, Swain Reefs, Queensland, Australia.

Author

Bray, D.J. & Thompson, V.J. 2017

Resources

Australian Faunal Directory

Zebra Seahorse, Hippocampus zebra Whitley 1964

References


Gomon, M.F. 1997. A remarkable new pygmy seahorse (Syngnathidae Hippocampus) from south-eastern Australia, with a redescription of H. bargibanti Whitley from New Caledonia. Memoirs of Museum Victoria 56(1): 245-253 

Horne, M.L. 2001. A new seahorse species (Syngnathidae: Hippocampus) from the Great Barrier Reef. Records of the Australian Museum 53(2): 243-246 

Johnson, J.W. 1999. Annotated checklist of the fishes of Moreton Bay, Queensland, Australia. Memoirs of the Queensland Museum 43(2): 709-762

Kuiter, R.H. 2000. Seahorses, Pipefishes and their Relatives. TMC Publishing, Chorleywood, UK, 240 pp.

Kuiter, R.H. 2001. Revision of the Australian Seahorse of the genus Hippocampus (Syngnathiformes: Syngnathidae) with descriptions of nine new species. Rec. Aust. Mus. 53: 293-340. (as Hippocampus montebelloensis and H. zebra)

Lourie, S.A., Pollom, R.A. & Foster, S.J. 2016. A global revision of the Seahorses Hippocampus Rafinesque 1810 (Actinopterygii: Syngnathiformes): Taxonomy and biogeography with recommendations for further research. Zootaxa 4146(1): 1–66.

Lourie, S.A., Vincent, A.C.J. & Hall, H.J. 1999. Seahorses. An identification guide to the world's species and their conservation. Project Seahorse. x 214 pp.

Pogonoski, J.J., D.A. Pollard & J.R. Paxton. 2002. Conservation Overview and Action Plan for Australian Threatened and Potentially Threatened Marine and Estuarine Fishes. Canberra, Environment Australia, 375 pp.

Whitley, G.P. 1964. Fishes from the Coral Sea and the Swain Reefs. Records of the Australian Museum 26(5): 145-195 figs 1-15 pls 8-10

Quick Facts


CAAB Code:37282080

Conservation:EPBC Act Marine Listed

Conservation:IUCN Data Deficient; CITES Listed

Depth:0-70 m

Habitat:Reef associated

Max Size:Height 9 cm

Species Image Gallery

Species Maps

CAAB distribution map