The artificial reef structures teaming with fish are the main attraction to diving Three Tree. There are tire reefs, large piles of corrugated pipe, a junk yard of appliances, a few small boats (one still on its trailer) and even a large satellite dish. Swarms of ratfish are often encountered as you swim from item to item here. The reefs are home to large rock fish, ling cod, painted greenlings, octopus and more while you are likely to find sculpins and snake pricklebacks along the cobble and sandy bottom. There have been sightings of wolf eels, giant octos and six gill sharks at this location if you are lucky.