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.
The bluefin tuna is a ferocious opportunistic predator that feeds on a variety of small fish, squid, crabs and other marine invertebrates. They group together in schools of similar size fish, often teaming up with other Thunnus species presumably to hunt schools of smaller fish.he bluefin tuna is a pelagic fish, that inhabits open ocean waters, bays and gulfs, and seasonally visits waters of the coastal shelf.