This is the sort of thing I would love doing. It used to be possible in my local bay in Italy, but the local bastards all wiped out the few octopi left in the rocks in front of my property. That, and the pollution wiped out the local limpets as well, it seems, over the years. Very sad. I hear that, even in the zoos, the wild animals there are forbidden from catching and eating live prey due to stupid human needs. Humans forget that wild animals(and even humans) need more than just eat a dead piece of meat. They also need to feel part of Nature.