Whales are extremely smart, almost on the same level as dolphins. There is no parameter through which the intelligence of whales can be judged, so their behavioral patterns are closely observed to understand how smart and perceptive they are, and most whale species display incredible amounts of social and emotional intelligence.
Whales have tail fins. Whale tails, however, differ significantly from the tails of other fish, including sharks. A whale’s tail has two lobes called flukes that move up and down rather than side by side and are separated by a deep cleft. Furthermore, rather than bones, the flukes are composed of dense, fibrous connective tissue.
Yes, whales eat crabs. However, crabs do not form an exclusive part of their diet. The truth is whales consume a variety of sea creatures, including small schooling fishes, squid, other whale species, smaller shark species, as well as crabs. Some whales prefer consuming different types of plankton, mainly krill.
Blue whales are mammals that exist even today, whereas megalodons are shark species that went extinct around 3 to 4 million years ago. Megalodons were deadly animals who hunted indiscriminately and had a sharp, biting force to match up to their fierceness. On the other hand, blue whales are quite friendly and prefer feeding on krill.