Answer:
Red Herring gets my vote :)
The level of mercury in seafood is a fact.
The fishermen do not cause this and this statement is a diversion tactic used to steer you away from the point that fishermen need to work. Mercury or no mercury it does not matter, they do not cause it.
Cars cause pollution. We should not drive cars. (crazy, right?)
Mom: It is time for you to do your homework. Kid: I had pizza for lunch.
attempt to distract from homework
Step-by-step explanation:
slippery slope: If one thing happens or is allowed to happen then that will lead to other steps and ultimately a final outcome
false authority: a persuasive technique in which it is assumed that the opinion of a recognized expert in one area should be taken as truth in another area
red herring - distraction tactic, attempts to mislead you from the relevant topic.