My dog ate a freeze-dried krill and half a bag of Hikari Sinking Carnivore once. He got flatulently airborne but otherwise was fine. I paid my friend to eat some flakes once. He said they taste like nothing. I (just) tried some flakes, meh, not much taste. Pretty salty. I have tried stranger things while fishing... I bit the head off a frozen Silverside from a pack bought at the bait and tackle, I tried some mussel meat shucked on a fishing boat, and I licked a Bunker (kind of Herring/Shad) fillet once. None was eventful in any way.
Mysis smell so good. Next time I buy a pack I will try one and report back.