I got a bit derailed on going to the lake, but Giga-lobsters
can be found on the beach. Spotted one tonight. There didn't seem to be any others in the area so it might have just wandered over looking for food or might have moved there to avoid competition, but it was in the shallows so salt water doesn't seem to bother it. I also managed to get a scan with one of my drones. I don't know enough about animal anatomy to fully analyse it, but I can tell you it's
definitely not a lobster, or a crayfish for that matter. It's got to be some kind of sea scorpion, I think. Can anyone at the university see if the library there has information on eurypterids? It'll be in the paleontology section. Best thing we could get is some kind of anatomical information we can compare to.
I will say there's something inside the tail that isn't there in a lobster and when I google scorpion anatomy it looks uncomfortably similar. I can't say without a sample for Redwing to analyse but it could be venomous, which means you
definitely should not be eating the tail willy-nilly. If it is it's probably just luck that no one's gotten sick yet.
tl;dr: Sea scorpions, not lobsters. Possibly venomous. Do not get stung, do not get pincered, do not eat the tail.