Diving is popular around this small, scenic island. You might see hammerhead sharks - more when the currents are strong, - Galapagos sharks, silkies, eagle and mobula rays, bluefin tuna, turtles, a sea lion or two, an abundance of reef fish, or the ocassional whale shark. But if you want to dive here, you will have to book a liveaboard; it is a 150 mile boatride from Santa Cruz island.
This Youtube video of a dive on Isla Wolf identifies the predominant species.