Both species also are periodically seen in local waters. So are killer whales and minke whales, each with grow up to 32' or 33', scientists say. But not all. In early 1997, there were several sightings of southbound newborns in Southern California waters. The calves weigh about half a ton at birth, compared to 15-35 tons for adult grays.
Calves feeds from their mothers.
But all other grays are, for the most part, bottom-feeders. Most of them roll on to their right side and suck up seafloor sediment that contains the amphipods that represent a substantial part of their diet. The water and sediment that's drawn from the seafloro is filtered through the whale's baleen, a long series of bristles located in the upper jaw. It's somewhat like a tooth brush. The grays expel the water and sediment and feed on the amphipods captured in the baleen.