Maybe, but they have certain criteria, if you read the whole paper.
It something you could look into. Also, find out what the general rules are for fishing and for taking octos. There must be regulations and limits that govern your whole area.
The only limits are for day and night octo's. They're supposed to be a pound. I think because they're considered game fish we're not supposed to take them as pets, but I don't really see a difference in taking one for food vs. taking one as a pet.
Where abouts is this cove and have you found any good green macro-algea for your tank? I haven't found any plants yet that look good in my tank.