Neoclinus Monogrammus (Neoclinus monogrammus) is a ray-finned fish of the family Chaenopsidae. It inhabits marine (saltwater) waters in benthic environments. This species can reach a maximum total length of 6.7 cm. With a trophic level of 2.6, it is an omnivore, consuming both plant and animal matter. It is assessed as Data Deficient on the IUCN Red List.
Dorsal spines (total): 20 - 22; Dorsal soft rays (total): 18 - 19; Anal spines: 2; Anal soft rays: 25 - 27; Vertebrae: 45 - 46. This species is distinguished from all other congeners by the following set of characters: continuous lateral-line canal with single row of pores; orbit with 2 cirri; no true ocellus on anterior part of dorsal fin; low dorsal fin, not elevated anteriorly in either sex; absence of narrow membrane along anterior edge of 1st dorsal-fin spine. Neoclinus monogrammus differs from Neoclinus nudiceps in having the following characters: lateral-line canal 9-15 pores and reaching to below 6th to 9th dorsal-fin spine (vs. 3-5 pores, reaching to below 3rd to 4th dorsal-fin spine); counts of supraorbital cirri tips, the anterior and posterior cirri with 10-28 and 3-14 tips, respectively (vs. 2-6 and 1-2 tips, respectively); male color pattern on head with scattered reddish spots (vs. no conspicuous spots); body depth in proportion to standard length 11.3-13.4% (vs. 13.0-15.4%); head depth in proportion to head length 51.2-58.0% (vs. 56.6-60.6%) .: elongated; Cross section: compressed.
Behavioural data for Neoclinus Monogrammus is currently being reviewed.
Marine; demersal; depth range ? - 28 m . Subtropical Northwest Pacific: Japan.
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