0 Members and 1 Guest are viewing this topic.
Your facts about hammerheads abilities to detect electrical currents astonish me, Doc. You'll laugh, but I've had several 'near miss' encounters with just such sharks (btw, wonderful creatures!) while diving where they nearly have run me over - no kidding. I believe in all cases they were just as 'astonished' as me when the incidents happened, not having noticed me until it was almost too late. Perhaps they were preoccupied with other matters as I was, looking for nudibranchs and other small creatures in the reef.Makes me wonder..... also, just exactly how much of an electrical field does a human create?
Why do Scalloped Hammerheads school?No one is sure why Scalloped Hammerheads school. We know that many sharks school at the youngest and most vulnerable stage of their lives. But Scalloped Hammerheads in the Sea of Cortez also school as adolescents and adults, when they have few predators. In the Sudanese Red Sea, however, Scalloped Hammerhead schools feature juveniles at the core with adults cruising the periphery like a protective wagon train in a Western movie.Some researchers suspect that Scalloped Hammerheads may school as a prelude to mating, but in the Sea of Cortez the schools are composed mostly of adolescent females. However, an underwater cinematographer once filmed a pair of Scalloped Hammerheads copulating in the Sea of Cortez, the sharks locked together and falling to the seabed in graceful slow-motion.The most likely reason Scalloped Hammerheads school in the Sea of Cortez is "refuging": the seamounts serve as meeting places conveniently near a rich food supply. It is likely that the schooling Scalloped Hammerheads use the seamounts as a conspicuous undersea landmark, taking advantage of opportunities to interact socially until nightfall, when the schools break up to feed.
Are Scalloped Hammerheads dangerous to humans?Scalloped Hammerheads are not particularly dangerous to humans unless they are provoked in some way, such as by chasing, spearing, or touching them.