UC Berkeley scientists have found a species of octopus whose members flirt, hold "hands", and ward off rival suitors as part of a complex mating ritual. Previously, researchers thought octopuses were fairly boring on the dating front, and didn't engage in complex behavior (which would be kind of a bummer, given that both male and female die not too long after mating). But the new work, published in Marine Biology, reveals that these slinky creatures have got their own moves.

Six weeks ago, the Monterey Bay Aquarium released a young white shark into the ocean, and the swimmer has already cruised down the coast to the waters off Mexico.

The shark, which spent 162 days at the aquarium after it was accidentally caught by a local fisherman, is the first to carry two different tracking tags.