Eyetooth Flounder, Japonolaeops gracilis (Fowler 1934)

Other Names: Philippine Slender Flounder

Eyetooth Flounder, Japonolaeops gracilis. Source: Australian National Fish Collection, CSIRO. License: CC By Attribution-NonCommercial-ShareAlike

This species has previously been known as Japonolaeops dentatus (a junior synonym of J. gracilis).

Cite this page as:
Bray, D.J. 2021, Japonolaeops gracilis in Fishes of Australia, accessed 21 Oct 2021, https://fishesofaustralia.net.au/Home/species/5584

Eyetooth Flounder, Japonolaeops gracilis (Fowler 1934)

More Info


Northwest of Dampier, Western Australia, and the Coral Sea northeast of Townsville to off Moreton Bay, Queensland. Elsewhere the species occurs in the Indo-west Pacific: from the Saya de Malha Bank through Fiji, New Caledonia, the Philippines, Taiwan and Japan.
Inhabits sandy and muddy areas.


Dorsal fin 109-125; Anal fin 90-101. 
Body elongate, depth 2.8-3.3 times in SL.; head length 4.9-5.7 times in SL. Eyes separated by a bony ridge. Mouth small, about equal to eye diameter. Both jaws on ocular side with teeth. First 2 dorsal fin rays not clearly separated from other rays.

Species Citation

Laeops gracilis Fowler 1934, Proceedings of the Academy of Natural Sciences of Philadelphia 85 (for 1933): 338, Fig. 92. Type locality: East of Masbate, Philippines, 12°04'15"N, 124°04'36"E, Albatross station D.5212, depth 108 fathoms.


Bray, D.J. 2021


Atlas of Living Australia

Eyetooth Flounder, Japonolaeops gracilis (Fowler 1934)


Amaoka, K. 1969. Studies on the sinestral flounders found in the waters around Japan. Taxonomy, anatomy, and physiology. Journal of the Shimonoseki College of Fisheries 18(2): 65-340 (as Japonolaeops dentatus)

Carpenter, K.E., Williams, J.T., Arceo, H., Quiazon, K.M., Muallil, R. & Nanola, C. 2019. Laeops gracilis. The IUCN Red List of Threatened Species 2019: e.T114157332A114157352. https://dx.doi.org/10.2305/IUCN.UK.2019-3.RLTS.T114157332A114157352.en. Downloaded on 25 March 2021.

Fowler, H.W. 1934. Descriptions of new fishes obtained in 1907 to 1910, chiefly in the Philippine Islands and adjacent seas. Proceedings of the Academy of Natural Sciences, Philadelphia 85: 233-367 figs 1-115

Hensley, D.A. & Amaoka, K. 2001. Bothidae. pp. 3799-3841 in Carpenter, K.E. & Niem, T.H. (eds). The Living Marine Resources of the Western Central Pacific. FAO Species Identification Guide for Fisheries Purposes. Rome : FAO Vol. 6 pp. 3381-4218. (as Japonolaeops dentatus and Laeops gracilis)

Voronina, E.P., Raredon, S. & Maclaine, J. 2020. Taxonomic status of three nominal species of Indo-Pacific flatfishes (Bothidae) with redescription of Japonolaeops gracilis new combination. Journal of Ichthyology 60(4): 520-530.

Quick Facts

CAAB Code:37460075

Conservation:IUCN Data Defficient

Depth:180-500 m

Habitat:Sandy, muddy areas

Max Size:20 cm SL

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