This weird looking, multi legged, crab eating cephalopod can be found in rocky pools. Getting them out of there is a mission on it's own. But if you manage to get one and eventually get the skin off they make for some good tasting seafood.
Here is one way to cook it.
After cleaning and tenderizing your occy you can cut the tentacles into small chunks. Bite size 2-3cm.
Dump it into a strong pot with a tight sealing lid. Throw quite a bit of worceshire sauce over the tenderized meat and let it simmer on a low heat in it's own sauce for about 45 minutes. Test it with a fork to see if its nice and tender after 45 minutes.
Serve it with some flavoured rice and a nice green salad.