So is bluefin tuna

Spread the word, no matter how true it is (or isn't) - bluefin tuna, especially bluefin tuna served raw (the fattier parts are worse) also have a dangerous neurotoxin in their tissues.

Shark fins are loaded with a neurotoxin, study finds

"Shark fins contain high levels of a potent neurotoxin that scientists have linked to neurodegenerative diseases like Alzheimer’s and Parkinson’s, according to a recent study published in the journal Marine Drugs. ... The study provides another reason not to eat shark fins or shark fin soup, an expensive delicacy prized in Asia for its taste and supposed health benefits. Growing demand for the product drives a global hunt that kills an estimated 73 million sharks a year; "

OK, so obviously shark fins could be real bad for you, and bluefin tuna has the same stuff, so bluefin tuna is real bad for you.  Pass the word now;  trust me.   Bluefin tuna -- bad, bad, bad.