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.
Blue whales, named for their bluish-gray coloration, are known for their immense size. Their coloration often includes grayish or whitish areas. When viewed from above, the rostrum appears broad and U-shaped and a large splashguard surrounds two blowholes. A blue whale's slender, vertical blow can reach a height of 9 m (30 ft.). Blue whales have 55-68 vertical grooves extending back almost to the navel. The dorsal fin is very small and set Â¾ of the way back and the trailing edge of the flukes are smooth except for a small notch in the center.