My boyfriend loves fishing I want for him to get a fishing vessel one day.
yea, he needs it because A fishing vessel is a boat or ship used to catch fish in the sea
They vessels are used amongst different types like commercial, artisanal and recreational fishing. He would be more into commercial fishing. 
ok, Many different kinds of vessels are used in commercial fishing
The only thing with the commercial fishing vessels tey boats are more marne style me personally I would be scared to be by all that water. 
there are currently four millions commercial fishing vessels
That is a lot of boats they make good money as well fisherman with fish vessel's make a minimum of $15000 per month. 
yes, they make a lot of fortune, Nearly all of these decked vessels are mechanised
I do know that they are mechanised with a special kind of net to catch many fish. 
It is difficult to estimate the number of recreational fishing  vessels