In this 2017 photo provided by Simon, a fin-mounted satellite tag is attached to a whale shark as a school of fish swims by, in the Galapagos Islands area of Ecuador. Despite typically being bigger than a double-decker bus, the elusive whale shark has only tiny, almost useless teeth. It's also one of the least understood animals in the ocean. (Photo by Simonjpierce.com via AP Photo)
