Whales

Flukes are used to identify whales because every whale's fluke is different. There are differences in color, shape, size, and scars. Scientists need this data so they can track their migration patterns. It was difficult to identify some flukes in the lab because many look alike but have subtle differences. I think the lab would be better if there was more than one picture of the same whale in different parts of the ocean. So that you could track the migration on the whale.