Half-moon blotch snake eel (Ophichthus semilunatus) is a ray-finned fish of the family Ophichthidae. It inhabits marine (saltwater) waters in benthic environments. This species can reach a maximum total length of 50 cm. With a trophic level of 3.9, it is a mid-level predator.
Vertebrae: 176. This species is distinguished by the following set of characters: head 9.4% TL; tail 57.5% TL; snout is not acute, 19.0% HL; eye large, 93.3% of snout length and 17.7% HL; dorsal-fin origin is well behind pectoral-fin tip by about three pectoral-fin lengths; teeth on maxilla triserial; SO 1+3; POM 6 or 7+2; predorsal vertebrae 29, preanal vertebrae 64, total vertebrae 176; anterior margin of anus with a half-moon shaped dark marking .Cross section: oval.
Behavioural data for Half-moon blotch snake eel is currently being reviewed.
Diet information for Half-moon blotch snake eel is currently being compiled.
Reproduction data for Half-moon blotch snake eel is currently being compiled.
Marine; demersal. Subtropical Northwest Pacific: Taiwan.
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