Phtheirichthys lineatus

FamilyScientific NameAuthorYearCommon Name
EcheneidaePhtheirichthys lineatus(Menzies)1791Slender Suckerfish

Phtheirichthys lineatus

Unique Characters: Sucking disc small, with 9 -11 laminae. Body very elongate, depth contained 8-14 times in standard length. Pectoral fins pointed. Usually a dark longitudinal band on sides, bordered with white. Anal-fin soft rays 29-41. Caudal fin lanceolate in young, the middle rays filamentous, almost truncate in adults, the lobes produced.

Similar Species:

Sharksucker
Echeneis naucrates

Whitefin Sharksucker
Echeneis neucratoides

Echeneis naucrates
Sharksucker – Echeneis naucrates

Sharksucker Echeneis naucrates. Usually a dark longitudinal band on sides, bordered with white. Sucking disc large, with 18-28 laminae (usually 23). Anal-fin soft rays 29-41. Body very elongate, depth contained 8-14 times in standard length. Pectoral fins pointed. Caudal fin lanceolate in young, the middle rays filamentous, almost truncate in adults, the lobes produced. Dorsal-fin rays usually 39; anal-fin soft rays usually 36. Tips of dorsal, anal, and caudal fins white.

Whitefin Sharksucker Echeneis neucratoides. Sucking disc large, with 18-28 laminae (usually 21). More white on fins at all sizes, usually with a broad margin. Body very elongate, depth contained 8-14 times in standard length. Pectoral fins pointed. Usually a dark longitudinal band on sides, bordered with white. Anal-fin soft rays 29-41. Caudal fin lanceolate in young, the middle rays filamentous, almost truncate in adults, the lobes produced. Dorsal-fin rays usually 36; anal-fin soft rays usually 33.

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