1 Pain: Persistent mouth pain is another common oral cancer sign. 2  A lump or thickening in the cheek. 3  A white or red patch on the gums, tongue, tonsil, or lining of the mouth. 4  A sore throat or feeling that something is caught in the throat that does not go away.
Blue whales are the largest predator to ever inhabit this planet, though it is thought to feed almost exclusively on tiny, shrimp-like creatures called euphausiids or krill. Feeding is usually at depths less than 100 m; harpooned animals have dived as deep as 500 m.lue whales, Balaenoptera musculus (Linnaeus, 1758), like all rorquals (Family Balaenopteridae, the family that includes the blue whale, Bryde's whale, fin whale, humpback whale, minke whale, and sei whale), are long, slender whales that are much more streamlined than other large whales.
Due to its great size and tusks, the walrus has only two natural predators: the killer whale (orca) and the polar bear. The walrus does not, however, comprise a significant component of either predator's diets.Both the orca and the polar bear are also most likely to prey on walrus calves.he archaic English word for walrusâ morse âis widely thought to have come from the Slavic languages, which in turn borrowed it from Finno-Ugric languages. Compare Ð¼Ð¾ÑÐ¶ (morÅ¾) in Russian, mursu in Finnish, morÅ¡a in Northern Saami, and morse in French.