Super pedantic note, venemous and poisonous are not the same thing. It's possible to eat/drink venom and not be poisoned, so long as it does not enter your bloodstream through a cut or ulcer.
And yes, been poked by a sea robin many a time, if they get you deeply your whole hand will swell up.
And speaking of poisonous sea life, growing up, we used to catch and cook pufferfish tails on a regular basis. Delicious deep fried. The variety we had (northern puffers, very cute) were not as toxic as the species used for Fugu but still has poisons in the skin and organs. No one ever taught us to avoid the organs or that they were toxic, but I seem to have survived 50 spins around the sun without adverse impact.
https://www.easthamptonstar.com/archive/one-oddest-and-tasti...