During a private tour last week, we had the chance to meet a scalloped hammerhead shark a few miles offshore Moorea. This species which is present in French Polynesia and specially in Marquesas islands is very rare to observe in Moorea waters. This shark was a female of 2.2 meters long, quite inquisitive but also skinny and solitary.
Scalloped Hammerhead Sharks (Sphyrna lewini) are probably the most commonly found species of hammerheads located in coastal regions, appearing in very shallow waters such as estuaries and inlets. Their distribution in the water reaches from the surface down to a depth of approx. 275 m. The young, however, remain mostly in shallow waters along the shore to avoid the danger of falling into the mouths of predators.
At certain times of the year and places, and during certain phases of their lives, scalloped hammerheads form very large schools, sometimes counting hundreds of individuals, but they also swim the oceans alone.
Some populations remain stationary, others clearly wander, migrating in the direction of the poles in summer. Some sexually-related migrations have also been observed, e.g. females who undertake migrations during particular periods of their sexual development.
See our video below.
Requin marteau halicorne de 2m20 rencontré au large de Moorea.Musique: Light – OdeszaCrédits vidéo : Moorea Ocean Adventures
Posted by Moorea Ocean Adventures on Thursday, March 22, 2018