Gyrinomimus johnpaxtoni
Gyrinomimus johnpaxtoni Su, Paxton & Ho, 2026
Paxton’s flabby whalefish
Gyrinomimus johnpaxtoni
photo by Yo Su et al., 2026

Family:  Cetomimidae (Flabby whalefishes)
Max. size:  37.6 cm SL (male/unsexed)
Environment:  bathypelagic; marine
Distribution:  Pacific and Atlantic: Japan, Taiwan, Indonesia, New Caledonia, USA, Mexico, Namibia.
Diagnosis:  Vertebrae: 56-56. This species is distinguished from its congeners by the following set of characters: absence of distinct spines on the dorsal and ventral arms of the lateral-line scales that protrude from skin; presence of cavernous tissue around anus and extending to base of anal-fin rays 6-21; filaments on fourth gill arch well developed, its length 50.0-92.1% filament on first arch; anal lappets 4-9with the last over base of anal-fin ray 8-15 and with scales; vertebrae 35-38 + 18-20 = 54-58; GRIII 0 + 1 + 1; dorsal-fin rays 19-21; anal-fin rays 18-21; lateral-line pores 19-25; lateral-line scales 18-24; and copular tooth plate moderately long and broad, greatest width 2.5-3.1 in length (Ref. 138879).
Biology: 
IUCN Red List Status: Not Evaluated (N.E.) Ref. (130435)
Threat to humans:  harmless


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