where these sharks mostly found?
The Galapagos shark is found mainly off tropical oceanic islands
Galapagos shark
The Galapagos shark is found mainly off tropical oceanic islands. 
what type of shark is common off the coast of the galapagos The Galapagos shark which specie do these sharks belong to? Requiem shark
wiki:21759924
Galapagos shark [SEP] Distribution and habitat
The Galapagos shark is found mainly off tropical oceanic islands. In the Atlantic Ocean, it occurs around Bermuda, the Virgin Islands, Madeira, Cape Verde, Ascension Island, Saint Helena and São Tomé Island. In the Indian Ocean, it is known from Walter's Shoal off southern Madagascar. In the Pacific Ocean, it occurs around Lord Howe Island, the Marianas Islands, the Marshall Islands, the Kermadec Islands, Tupai, the Tuamotu Archipelago, the Hawaiian Islands, the Galapagos Islands, Cocos Island, the Revillagigedo Islands, Clipperton Island, and Malpelo. There are a few reports of this species in continental waters off the Iberian Peninsula, Baja California, Guatemala, Colombia, and eastern Australia.