''Narcetes shonanmaruae'', the yokozuna slickhead, is a species of marine

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fishes, is a class of bony fish. They comprise over 50% of living vertebrate species. The ray-finned fishes are so called because their fins are webs of skin supported by bony or hor ...

, a

slickhead Slickheads, also known as nakedheads or smoothheads, are deep water fishes that belong to the family Alepocephalidae. They are most commonly found in the bathypelagic layer, which is approximately 3000m below the surface. They get their name from ...

belonging to the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Alepocephalidae Slickheads, also known as nakedheads or smoothheads, are deep water fishes that belong to the family Alepocephalidae. They are most commonly found in the bathypelagic layer, which is approximately 3000m below the surface. They get their name from ...

. It was first formally described in 2021, the description being based on four specimens which were collected below a depth of in

Suruga Bay Suruga Bay (駿河湾, ''Suruga-wan'') is a bay on the Pacific coast of Honshū in Shizuoka Prefecture, Japan. It is situated north of a straight line from Omaezaki Point to Irōzaki Point at the tip of the Izu Peninsula and surrounded by Honshū ...

in Japan. Its largest verified size is , however recent footage with a reference has given the fish a much larger estimated length of , however unverified. The specific name references ''Shonan Maru'', the ship the specimens were collected from. The proposed English name, yokozuna slickhead, refers to the highest ranking of

sumo is a form of competitive full-contact wrestling where a ''rikishi'' (wrestler) attempts to force his opponent out of a circular ring (''dohyō'') or into touching the ground with any body part other than the soles of his feet (usually by thr ...

wrestler, the

yokozuna , or , is the top division of the six divisions of professional sumo. Its size is fixed at 42 wrestlers (''rikishi''), ordered into five ranks according to their ability as defined by their performance in previous tournaments. This is the on ...

References

Alepocephalidae Taxa named by Jan Yde Poulsen, Taxa named by Hitoshi Ida Taxa named by Masaru Kawato Taxa named by Yoshihiro Fujiwara Fish described in 2021 {{Rayfinned-fish-stub