Aetobatus ocellatus

The ocellated eagle ray (Aetobatus ocellatus) is a species of cartilaginous fish in the eagle ray family Myliobatidae. It is found in the tropical Indo-West Pacific region.[2][3] In the past it was included in the spotted eagle ray (A. narinari), a species restricted to the Atlantic after the split.[4][5][6]

Aetobatus ocellatus
Aetobatus ocellatus in the Maldives
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Chondrichthyes
Order:
Myliobatiformes
Family:
Myliobatidae
Genus:
Aetobatus
Species:
A. ocellatus
Binomial name
Aetobatus ocellatus
(Kuhl, 1823)

Description and behavior

Compared to the Spotted eagle ray, A. ocellatus has a longer tail (mean total length 281 vs. 263% DW) and a longer stinging spine (mean length 9.7 vs. 8.9% DW). The background coloration of the dorsal surface in A. ocellatus is dark greenish/greying to almost blackish whereas A. narinari is much paler, medium yellowish to brownish.[4] Their foraging range is based on anthropogenic noises with populations structured according to ontogenetic stage.[7]


Reproduction

The ocellated eagle ray exhibits Ovoviviparity with embryos feeding on yolk initially, then receiving additional nutrients from the mother through indirect absorption of enriched uterine fluid.[8] The gestation period lasts over 12 months and only produces a few pups.[9]

Diet

The ocellated eagle ray feeds primarily on gastropod, bivalve molluscs, crustaceans, worms, octopuses and fishes.[10]

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References
  1. Kyne, P.M., Dudgeon, C.L., Ishihara, H., Dudley, S.F.J. & White, W.T. (2016). Aetobatus ocellatus. The IUCN Red List of Threatened Species doi:10.2305/IUCN.UK.2016-1.RLTS.T42566169A42566212.en
  2. "Aetobatus ocellatus (Kuhl, 1823)". FishBase. Retrieved 2015-05-17.
  3. Kuhl, H. in van Hasselt, J.C. (1823) Uittreksel uit een’ brief van Dr. J. C. van Hasselt, aan den Heer C. J. Temminck. Algemein Konst- en Letter-bode I Deel (no. 20): 315–317.
  4. White, W.T., P.R. Last, G.J.P. Naylor, K. Jensen & J.N. Caira (2010). Clarification of Aetobatus ocellatus (Kuhl, 1823) as a valid species, and a comparison with Aetobatus narinari (Euphrasen, 1790) (Rajiformes: Myliobatidae). Pp. 141-164 in: Last, P.R., White, W.T. & Pogonoski, J.J., eds. (2010). Descriptions of new sharks and rays from Borneo. CSIRO Marine and Atmospheric Research Paper no. 32.
  5. Richards, V.P., M. Henning, W. Witzell & M.S. Shivji (2009). Species delineation and evolutionary history of the globally distributed spotted eagle ray (Aetobatus narinari). J Hered. 100(3): 273-83. doi: 10.1093/jhered/esp005
  6. White, W.T. (2014): A revised generic arrangement for the eagle ray family Myliobatidae, with definitions for the valid genera. Zootaxa, 3860 (2): 149–166.
  7. Lecchini, David (2018). "Distribution patterns of ocellated eagle rays, Aetobatus ocellatus, along two sites in Moorea Island, French Polynesia". CYBIUM. 42 (4): 313–320.
  8. Dulvy, N.K. and J.D. Reynolds, 1997. Evolutionary transitions among egg-laying, live-bearing and maternal inputs in sharks and rays. Proc. R. Soc. Lond., Ser. B: Biol. Sci. 264:1309-1315.
  9. Schluessel, V (2010). "Diet and reproduction in the white-spotted eagle ray Aetobatus nari- nari from Queensland, australia and the Penghu islands, Taiwan". Mar. Freshw. Res. 61:1278-1289.
  10. Randall, J.E. and Cea, A. (2011). Shore fishes of Easter Island. University of Hawai'i Press, 164 p.


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