They spend the summer there, feeding. The grey whales travel as individuals or in small groups at about four miles per hour. Resident greys can also be seen, as they move from bay to bay seeking sustenance. They stay here most of the year. Baleen whales have not developed teeth, but have evolved comb-like structures in their mouths called a baleen, which strains the plankton from the water.
Most baleens swim with their mouths open, letting the water and nutrients come through.
Grey whales lacks a dorsal fin and is adapted to bottom-feeding. They are the only baleen whales to feed by taking in mouthfuls of mud from the bottom and straining it for food. Despite their large size, baleen whales have very small throats. Greys are from 40 to 45 feet in length or 13.7 m, and weigh about 34 tons. Grey whales are dark grey in colour, mottled by a lighter hue.