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Deep-water observation of scalloped hammerhead Sphyrna lewini in the western Indian Ocean off Tanzania

Published online by Cambridge University Press:  24 June 2015

Alec B.M. Moore
RSK Environment Ltd., Spring Lodge, 172 Chester Road, Helsby, Cheshire WA6 0AR, UK
Andrew R. Gates*
National Oceanography Centre, University of Southampton Waterfront Campus, European Way, Southampton SO14 3ZH, UK
Correspondence should be addressed to: A.R. Gates, National Oceanography Centre, University of Southampton, Waterfront Campus, European Way, Southampton, SO14 3ZHUK email:
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A scalloped hammerhead Sphyrna lewini was observed opportunistically from a remotely operated vehicle 1 m off the seabed at 1042 m depth, during hydrocarbon exploration activities in the Ruvuma Basin off Tanzania. The observation, which occurred during night hours, is the deepest accurately recorded for this species and the first deep-water record for the Indian Ocean. The record adds support for the occurrence in deep water during night hours being a widespread and possibly common behaviour in this species, and further expands a small but growing literature that meso- and bathypelagic environments may be of greater importance to elasmobranchs previously considered to be primarily epipelagic.

Research Article
Copyright © Marine Biological Association of the United Kingdom 2015 

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Bernal, D., Carlson, J.K., Goldman, K.J. and Lowe, C.G. (2012) Energetics, metabolism, and endothermy in sharks and rays. In Carrier, J.C., Musick, J.A. and Heithaus, M.R. (eds) Biology of sharks and their relatives, 2nd edn.Boca Raton: CRC Press, pp. 211237.CrossRefGoogle Scholar
Bessudo, S., Soler, G.A., Klimley, P.A., Ketchum, J., Arauz, R., Hearn, A., Guzmán, A. and Calmettes, B. (2011) Vertical and horizontal movements of the scalloped hammerhead shark (Sphyrna lewini) around Malpelo and Cocos Islands (Tropical Eastern Pacific) using satellite telemetry. Boletín de Investigaciones Marinas Y Costeras-INVEMAR 40, 91106.Google Scholar
Brunnschweiler, J.M., Baensch, H., Pierce, S.J. and Sims, D.W. (2008) Deep-diving behaviour of a whale shark Rhincodon typus during long distance movement in the western Indian Ocean. Journal of Fish Biology 74, 706709.CrossRefGoogle ScholarPubMed
Ebert, D.A., Fowler, S. and Compagno, L. (2013) Sharks of the world: A fully illustrated guide. Plymouth: Wild Nature Press.Google Scholar
Carlson, J.K. and Parsons, G.R. (2001) The effects of hypoxia on three sympatric shark species: physiological and behavioural responses. Environmental Biology of Fishes 61, 427433.CrossRefGoogle Scholar
Carlson, J.K. and Parsons, G.R. (2003) Respiratory and hematological responses of the bonnethead shark, Sphyrna tiburo, to acute changes in dissolved oxygen. Journal of Experimental Marine Biology and Ecology 294, 1526.CrossRefGoogle Scholar
Compagno, L., Dando, M. and Fowler, S. (2005) A field guide to the sharks of the world. London: Harper Collins.Google Scholar
Hoffmayer, E.R., Franks, J.S., Driggers, W.B. and Howey, P. (2013) Diel vertical movement of a scalloped hammerhead, Sphyrna lewini, in the northern Gulf of Mexico. Bulletin of Marine Science 89, 551557.CrossRefGoogle Scholar
Hoyos-Pallida, E.M., Ketchum, J.T., Klimley, A.P. and Galvan-Magana, F. (2014) Ontogenetic migration of a female scalloped hammerhead shark Sphyrna lewini in the Gulf of California. Animal Biotelemetry 2, 17.CrossRefGoogle Scholar
Jones, D.O.B. (2009) Using existing industrial remotely operated vehicles for deep-sea science. Zoologica Scripta 38, 4147.CrossRefGoogle Scholar
Jones, D.O.B., Gates, A.R., Curry, R.A., Thomson, M., Pile, A. and Benfield, M. (eds) (2009) SERPENT project. Media database archive. Available at: (accessed 20 June 2014).Google Scholar
Jorgensen, S.J., Klimley, A.P. and Muhlia-Melo, A.F. (2009) Scalloped hammerhead shark Sphyrna lewini, utilizes deep-water, hypoxic zone in Gulf of California. Journal of Fish Biology 74, 16821687.CrossRefGoogle ScholarPubMed
Klimley, A.P. (1993) Highly directional swimming by scalloped hammerhead sharks (Sphyrna lewini) and subsurface irradiance, temperature, bathymetry, and geomagnetic field. Marine Biology 117, 122.CrossRefGoogle Scholar
Schlitzer, R. (2000) Electronic atlas of WOCE hydrographic and tracer data. EOS Transactions of the American Geophysical Union 81. Available at: (accessed 29 April 2015).Google Scholar
Thorrold, S.R., Afonso, P., Fontes, J., Braun, C.D., Santos, S.R., Skomal, G.B. and Berumen, M.L. (2014) Extreme diving behaviour in devil rays links surface waters and the deep ocean. Nature Communications 5, 4274.CrossRefGoogle ScholarPubMed
Zemlak, T.S., Ward, R.D., Connell, A.D., Holmes, B.H. and Hebert, P.D.N. (2009) DNA Barcoding reveals overlooked marine fishes. Molecular Ecology Resources 9(Suppl 1), 237242.CrossRefGoogle ScholarPubMed

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