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.
Whale Dangers and Predators. Whales have no natural predators in the water so they have been able to live for many years in the water if the conditions are right.However, there are plenty of dangers to whales that you may not be aware of.Some of these dangers are so significant that they have lead to some being classified as endangered species.thers hunt whales to eat for food or for a sport. They are enormous mammals so the thrill of the hunt is one that may people are interested in. With the increase in the number of boats in the waters, whales are in danger of being hit and killed by them.