Gyrinomimus amaokai Su, Paxton & Ho, 2026
Amaoka’s flabby whalefish
Upload your photos and videos
Pictures | Google image
Gyrinomimus amaokai
Picture by Yo Su et al., 2026
Pictures | Google image
Picture by Yo Su et al., 2026
Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Teleostei (teleosts) > Beryciformes (Sawbellies) > Cetomimidae (Flabby whalefishes)
Etymology: Gyrinomimus: Greek, gyrinos = tadpole + Latin, mimus = imitator (Ref. 45335); amaokai: Name 'amaokai' in honor of Dr. Kunio Amaoka, Professor Emeritus of Hokkaido University, for his great contributions to our knowledge of deep-sea fishes, documenting the fresh condition of holotype, and his long-term friendship with the authors.
Etymology: Gyrinomimus: Greek, gyrinos = tadpole + Latin, mimus = imitator (Ref. 45335); amaokai: Name 'amaokai' in honor of Dr. Kunio Amaoka, Professor Emeritus of Hokkaido University, for his great contributions to our knowledge of deep-sea fishes, documenting the fresh condition of holotype, and his long-term friendship with the authors.
Environment: milieu / climate zone / depth range / distribution range Ecology
Marine; bathypelagic; depth range 0 - 3000 m (Ref. 138879). Subtropical
Distribution Territories | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri
Northwest Pacific: Japan.
Size / Weight / Age
Short description Identification keys | Morphology | Morphometrics
Vertebrae: 51 - 53. This species is distinguished from its congeners by the following set of characters: 2-5 (very rarely 1) spines on dorsal and ventral arms of the lateral-line scales which, at least in preserved specimens, penetrate the skin of the lateral-line canal; cavernous tissue present around anus and extending to base of anterior 2nd-14th anal-fin rays; filaments on fourth gill arch well developed, its length 43.2-64.6% filament on first arch; anal lappets 8-14, with last over anal-fin rays 12-16, and with scales; vertebrae 32-34 + 17-20 = 51-53; GRIII 1 + 1 + 1; dorsal-fin rays 17-21; anal-fin rays 17-20; lateral-line pores 18-22; lateral-line scales 17-21; and IO 7 + 2 (very rarely 8 + 2) and copular tooth plate elongated, greatest width 3.3-4.1 in length (Ref. 138879).
Body shape (shape guide): elongated.
Body shape (shape guide): elongated.
Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Main reference
Upload your references | References | Coordinator : Paxton, John | Collaborators
Su, Y., J.R. Paxton and H.-C. Ho, 2026. Four new species of the whalefish genus Gyrinomimus Parr, 1934, with the establishment of three new species groups (Beryciformes, Cetomimidae). ZooKeys 1279: 57-95. (Ref. 138879)
CITES
Not Evaluated
Threat to humans
Harmless
Human uses
FAO - Publication: search | FishSource |
More information
Trophic ecology
Food items (preys)
Diet composition
Food consumption
Food rations
Predators
Food items (preys)
Diet composition
Food consumption
Food rations
Predators
Ecology
Ecology
Ecology
Population dynamics
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Recruitment
Abundance
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Recruitment
Abundance
Life cycle
Reproduction
Maturity
Maturity/Gills rel.
Fecundity
Spawning
Spawning aggregations
Eggs
Egg development
Larvae
Larval dynamics
Reproduction
Maturity
Maturity/Gills rel.
Fecundity
Spawning
Spawning aggregations
Eggs
Egg development
Larvae
Larval dynamics
Anatomy
Gill area
Brain
Otolith
Gill area
Brain
Otolith
Physiology
Body composition
Nutrients
Oxygen consumption
Swimming type
Swimming speed
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)
Body composition
Nutrients
Oxygen consumption
Swimming type
Swimming speed
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)
Genetics
Genome
Genetics
Heterozygosity
Heritability
Genetic Diversity
Genome
Genetics
Heterozygosity
Heritability
Genetic Diversity
Human related
Aquaculture systems
Aquaculture profiles
Strains
Ciguatera cases
Stamps, coins, misc.
Aquaculture systems
Aquaculture profiles
Strains
Ciguatera cases
Stamps, coins, misc.
Tools
Special reports
Download XML
Internet sources
AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoobank | Zoological Record
Estimates based on models
|
Phylogenetic diversity index (Ref. 82804) |
PD50 = 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high]. |
| Bayesian length-weight | a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245). |
| 0 | |
|
Resilience (Ref. 120179) |
Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.). |
|
Fishing Vulnerability (Ref. 59153) |
Moderate vulnerability (43 of 100). 🛈 |