I’m a little behind on my fun blog reads, due to travel and Shabbat and Pesach, but if you haven’t yet seen this conversation, it’s great.
An interview with Ann VanderMeet (bat/bar mitzvah teacher; editor of of Weird Tales, co-editor of New Weird and Steampunk) on which imaginary or fantastical animals would be kosher.

ET – A: “…..?” EM: “It had cloven hooves.” A: “It’s a humanoid.” EM: “It looked like a pile of dung. It seemed to chew cud. Would any alien be automatically un-kosher?” A: “I guess it really depends on the alien–like a plant?” EM: “An alien that comes down to Earth.” A: “No, because they wouldn’t be considered an animal.” EM: “What if they looked just like a cow, but with a brain?” A: “Cows have brains.” EM: “Arggh!” A: “But cows don’t travel to other planets using their brains.” EM: “My point exactly!” A: “Anything intelligent is not kosher.”
Mermaid – A: “No, for the obvious reasons.” EM: “What if you marry one? Is that kosher? Will a rabbi marry you?” A: “Kosher is a term about eating, not about sex.” EM: “I’m not talking about sex–I’m talking about marriage!” A: “If the mermaid is Jewish, the rabbi will probably marry you. But only if you’re Jewish too. But you’ll definitely have to find the right rabbi…”
Mongolian Death Worm – A: “No, because you cannot eat anything that crawls on its belly.” EM: “Does that mean an injured kosher animal that is crawling along isn’t kosher any more?” A: “Yes, because you can’t eat an animal that’s been injured or is sick.” EM: “It’s a wonder you haven’t all starved to death.”

The full list can be found here. There’s also a great deal of comments/discussion over at Boing Boing.
I’m in the mountains now; I’ll see if I can find a sasquatch to snack on…