T. Rothig, J.L.Y. Spaet, A. Kattan, I.K. Schulz, M. Roberts, A. Roik, C.R. Voolstra
Biodiversity, volume 46, issue 1, pp. 25-26, (2016)
Shark-cetacean aggregations and associations of false killer whales (Pseudorca crassidens) with other cetaceans have been reported previously (e.g., Heithaus 2001; Baird et al. 2008). However, this is the first description of nonaggressive associations of P. crassidens with noncetaceans. Here we report encounters of P. crassidens associated with silky sharks (Carcharhinus falciformis) at different reef sites of the Farasan Banks, Red Sea, Saudi Arabia in 2014. On August 13, a group of 17+ P. crassidens (2-4 m in body
length; including one juvenile, <2 m; Fig. 1a) approached a dive boat and spent approximately 45 minutes interacting with ~20 snorkelers at BDohra Island Reef^ (19° 49'16.80"N, 39° 54'6.75"E). The group was accompanied by 6+ C. falciformis (1.6-2 m; Fig. 1b), which remained in close proximity (~15 m) to snorkelers and whales for approximately 20 minutes (Fig. 1c).