• Korean Journal of Ichthyology
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• v.20 no.2
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• pp.112-116
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• 2008

Feeding habits of Hippocampus mohnikei (4.1~10.4 cm SL) collected from an eelgrass bed in Dongdae Bay, Korea were studied. H. mohnikei was a carnivore fish which consumed mainly gammarid amphipods. Its diets also included a small amount of caprellid amphipods, tanaids, copepods, mysids, and eelgrass. Gammarid amphipods were the most important prey organisms to the diet of all size classes of H. mohnikei despite smaller H. mohnikei (<4.5 cm SL) fed copepods. H. mohnikei fed on larger sizes of prey as their size increased. The dietary breadth of H. mohnikei were decreased with increasing their size.

• Journal of Aquaculture
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• v.20 no.1
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• pp.41-46
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• 2007

Seahorse is an interesting organism for the study of its conservation as well as development as an marine ornament fish. To investigate the ecological characteristics and fish fauna around the habitat of such an endangered species, fishes were collected from the seahorse habitat. A total of 161 fishes were classified into 8 families and 11 species including two species of seahorse, Hippocampus mohnikei and H. coronatus representing 1.9% and 1.2%, respectively, of the population. The most dominant fish species in the area was Takifugu niphobles accounting for 30.4% of the population. The predators of the seahorse such as Acanthopagrus schlegeli, Lateolabrax japonicus and Lateolabrax maculatus were found in the relative abundance of 0.6%, 5.6%, and 11.8%, respectively. The relative abundance of H. coronatus ($0.96\;ind./1,000\;m^2$), H. mohnikei ($0.97\;ind./1,000\;m^2$) and the other coexisting fishes are similar in all the areas investigated (P>0.05).

• Journal of Fisheries and Marine Sciences Education
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• v.28 no.4
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• pp.1159-1170
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• 2016

This study examines the distribution and taxonomy of sea horses in South Korea, specifically sea horses that were caught in the Southern Sea, centering on Yeosu, South Korea. Specimen collection methods The samples were collected by set net, skimming nets, dragnets, and landing nets on a boat, as well as scuba diving. A total of 128 sea horses belonging to three species were collected. To investigate the exact distribution pattern, the catch per unit effort and the population density per $1,000m^2$ were calculated for each site in the Southern Sea. The result shows the highest catch by set nets was 29 sea horses a day in Site B at Dolsan-eup, Port Impo, and the highest catch by scuba diving was 8 sea horses a day in Site B at Gijang-gun, Busan. The highest population density was 61.2 sea horses in the coast of Gijang-gun, Busan. Genetic information analysis and morphological analysis were performed for determination of species. As a result, four Hippocampus trimaculatus, (flat-faced sea horses), 45 Hippocampus coronatus (Crowned sea horses), and 79 Hippocampus mohnikei (Japanese sea horses) were distinguished.