Grideye Spiderfish, Ipnops agassizii Garman 1899

Other Names: Grideye Fish

Ipnops meadi filmed by an ROV on the seafloor in the Central Pacific, May 2017. Source: NOAA Office of Ocean Exploration and Research, Mountains in the Deep: Exploring the Central Pacific Basin, May 2017. License: CC by Attribution

A slender black deep-sea fish with eyes modified into large pale flattened photosensitive plates on the head. The eyes lack a lens.

Cite this page as:
Bray, D.J. 2017, Ipnops agassizii in Fishes of Australia, accessed 25 Jan 2020,

Grideye Spiderfish, Ipnops agassizii Garman 1899

More Info


Off north Queensland southwards to the Great Australian Bight, in depths of 1789-3855 m. Elsewhere the species occurs in the tropical and temperate Indo-Pacific.


The skull is dorsoventrally compressed, and the frontals extend laterally beneath the large photosensitive plates in Ipnops.

Species Citation

Ipnops agassizi Garman 1899, Mem. Mus. Comp. Zool. Harv. Univ. 24: 259, pl. H(figs 2, 2a). Type locality: off Galapagos Islands [2°34´N, 92°06´W]. 


Bray, D.J. 2017

Grideye Spiderfish, Ipnops agassizii Garman 1899


Garman, S. 1899. Reports on an exploration off the west coasts of Mexico, Central and South America, and off the Galapagos Islands, in charge of Alexander Agassiz, by the U.S. Fish Commission Steamer Albatross, during 1891, Lieut. Commander Z.L. Tanner, U.S.N., commanding. 26. The fishes.Memoirs of the Museum of Comparative Zoology, Harvard University 24: 1-431, 98 pls.  PDF at BHL

Marshall, N.B. & Staiger, J.C. 1975. Aspects of the structure, relationships, and biology of the deep-sea fish Ipnops murrayi Gunther (Family Bathypteroidae). Bulletin of Marine Science 25: 101-111. PDF Open access

Mead, G.W. 1966. Family Ipnopidae. In Fishes of the Western North Atlantic. Sears Found. Mar. Res., Mem. 1(5): 147-161.

Merrett, N.R. & Nielsen, J.G. 1987. A new genus and species of the family Ipnopidae (Pisces, Teleostei) from the eastern North Atlantic, with notes on its ecology. Journal of Fish Biology 31: 451-464

Nielsen, J.G. 1966. Synopsis of the Ipnopidae (Pisces, Iniomi) with descriptions of two new abyssal species. Galathea Report 8: 49-79. PDF

Okiyama, M. 1986. Bathypelagic capture of a metamorphosing juvenile of Ipnops agassizi (Ipnopidae, Myctophiformes). Japanese Journal of Ichthyology 32(4): 443-446· DOI: 10.1007/BF02905424 PDF

Quick Facts

CAAB Code:37123004

Biology:Simultaneous hermaphrodite

Depth:1392-4163 m

Habitat:Bottom dweller, abyssal zone

Max Size:15 cm SL

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Species Maps

CAAB distribution map