Maybe hammerheads and blue sharks and bull sharks too, though it's really the tiger sharks one needs to worry about.

Hazards include blue sharks and jellyfish but also man, whose fishing nets and long lines catch and kill countless loggerheads.

Tuna fishing has hugely affected shark populations: 23% of "other" fish caught inadvertently during tuna fishing were blue sharks.

They were blue sharks, dreadful man-eaters with enormous tails, dull, glassy stares, and phosphorescent matter oozing from holes around their snouts.

In the earliest days of the trip, he encountered four blue sharks, each the length of your average-size car, off Tory Island.

Better for him to stay there, and perhaps recover, than to die on board the O'HIGGINS and be thrown to the blue sharks.

He's appalled to find a Japanese trawler and a gigantic freezer container fishing with impunity off the shores of Cabo Verde for blue sharks.

Dark horses The Blue Sharks of Cape Verde are appearing in the tournament for the second time in a row.

"Guess how many sharks I have?" A pattern of tiny blue sharks covered his suit.

The entire " Blue Sharks" team burst into the post-match press conference to chant and sing and dance in front of journalists.

The " Blue Sharks" are unbeaten in their first appearance at the Africa Cup of Nations, having held Morocco and hosts South Africa and beaten Angola.