Which one?
replyMaybe pythons - some types of crocodile/alligators. But that's very region specific.
replySharks as well.
replySturgeon. Maybe lamprey (I've never tried it)
replyMolluscs? Snails have been around a very long time in one form or another.
replyOysters and other bivalves too...
replyCatshark maybe, although I don't know if that species in particular is old enough.
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