kw: invasive species, lionfish, sashimi
The lionfish is one of the most venomous fish, sharing these "honors" with the stonefish and toadfish and a few others that have poison-loaded spines. The flesh itself is not poisonous, however, so these are good eating, though they are rather small; the largest seldom exceed 16 inches (40 cm) in length. I don't know if they can be caught by hook, but they are a popular target of spear fishers. This opens a door to at least some reduction in their numbers: Lionfish Sashimi. The human appetite for fish has led to the near extermination of cod, shad and other food fish. Now let's do some good with this tendency! Eat more Lionfish.
Kuriya Dining in Singapore. One reviewer noted that the fish is also served poached or grilled. I understand that a few chefs (not necessarily at Kuriya) are able to utilize just a smidgen of the venom, to give it a bit of "bite", similar to Fugu. I'd prefer it venom-free myself. I don't eat for thrills, but for the taste.
However, the Singapore lionfish aren't invasive there. So if you don't want to spend $2,000 in airfare to satisfy your Lionfish craving, and wish to do some good where it matters, here are a few more "local" options: