Orange blotched eel (Apterichtus hatookai) is a ray-finned fish of the family Ophichthidae. It inhabits marine (saltwater) waters. This species can reach a maximum total length of 53.4 cm. It occurs at depths between 4 and 7 metres. With a trophic level of 3.9, it is a mid-level predator. It is assessed as Data Deficient on the IUCN Red List.
This species is distinguished by the following characters: head 5.1-6.1 % TL, 13.3-16.0 % of preanal length; tail 60.4-62.0 % TL; body depth at gill opening 0.9-1.5 % TL, 2.3-3.8 % of preanal length; the anterior tip of the lower jaw is below the center of the eye; supratemporal pores 7; preopercular pores 4; lateral-line pores before anus 54-58; preanal vertebrae 52-56, total 137-141; MVF 54-139 ; teeth conical and uniserial on jaws and vomer (with a single vomerine tooth); body coloration is yellowish brown to dark brown with small black punctuations, pale brown blotches on head and breast; with fresh specimens have reddish brown blotches, slightly paler along mid-flanks, brilliant orange blotches on head and breast, some larger than eye .: eel-like; Cross section: oval.
Behavioural data for Orange blotched eel is currently being reviewed.
Diet information for Orange blotched eel is currently being compiled.
Reproduction data for Orange blotched eel is currently being compiled.
Marine; benthopelagic; depth range 4 - 7 m . Subtropical Northwest Pacific: Japan and China (SE Fujian).
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