![]() "The catshark appears to play dead," Neil Hammerschlag, director of the shark research and conservation program at the University of Miami, said in the program. The team captured dramatic footage of a catshark swimming along the seafloor, but when great white appears and the catshark freezes. They realized the sharks were gathering around three river mouths where lots of other, smaller shark species live, breed and feed, so the researchers deployed underwater cameras to see what was happening beneath the surface. Related: 2 orcas slaughter 19 sharks in a single day in South Africa, eating their livers and leaving them to rot ![]() To find out, Williams and Enrico Gennari, a shark scientist who specializes in the study of great whites, used tracking data to see where the sharks were going during seal breeding season, a period when fewer seals enter the water, making them far less abundant as a source of prey. (Image credit: Philip Thurston/Getty Images) Researchers found sharks make up a bigger proportion of great white ( Carcharodon carcharias) diets than seals do.
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