Depends on the dive site, Tenerife offers you a lot of different things. Being a volcanic island we have an astonishing underwater landscapes, bridges, tunnels, caves and basaltic rock formations.
But you will also find a lot of different fish, turtles, big rays of different kinds, octopus and cuttlefish, you can also find the beloved macro animals (nudibranchs, ...)
We don't have corals here, but people who are willing to enjoy the beauty of nature will be amazed by the big variety and biodiversity!