This gregarious cetacean isn’t born with those beauty marks, however. Calves start out gray, like other dolphins. After about three years, they begin to develop speckles. After a few more years ...

The 39-foot gray whale carcass was discovered floating off Marina del Rey on Saturday with most of its head missing.

Over time, that name morphed into "killer whales." Scientists don't know whether orcas kill for fun. The marine mammals do some things, like killing ... members of the dolphin family.