The Oceanic puffer is a pelagic fish that lives in tropical and subtropical waters of the Atlantic, Pacific and Indian Oceans. It tends to live in large schools and eats crustaceans and molluscs.
It is highly toxic because its organs contain deadly doses of Tetrodotoxin (the stuff Voodoo priests use to create real zombies) and should never be eaten.
Oceanic puffers have always been occasional visitors to the Canary Islands but now seem to appearing in much higher numbers. This is probably because the waters around the Canary Islands are gradually warming up (by two degrees Celcius in the last 30 years).
The IEO has put out a warning to make sure that people recognise the Oceanic Puffer and don't try to eat it or sell it to restaurants.