References and Further Information: 1  Morrissey, J.F. and J.L. Sumich. 2012. Introduction to the Biology of Marine Life (10th Edition). 2  University of California Museum of Paleontology. Bilateral (left/right) Symmetry.
A lot of things. For one, Whale sharks are fish and use gills to breathe. Blue whales are mammals. The blue whale is also bigger than the whale shark. The tail structure is also different if you watch the whale shark swim, it uses its tail in a side to side motion while the blue whale uses a up and down movement.
The whale shark is the largest fish in the world and can be more than 40 feet long. They are found in warm seas throughout the world. They are a docile species that feeds on plankton and other tiny sea creatures.escription. Whale sharks have streamlined bodies, flattened heads, large gills and a wide mouth near the front of the snout. Their skin ranges between gray and brown and features white spots and pale stripes in checkerboard-like pattern.