There is an estimated four million commercial fishing vessels in use today. The commercial fishing industry is quite interesting 
I guess there are a lot of things to fish, fish themselves, seafood like crab and lobster etc.
What is your favorite type of seafood? Do you like red lobster? They have over 700 locations worldwide. I bet they are one of the many reasons we have so many fishing vessels. 
Red Lobster is ok, their seafood is just adaquite, they do not give you enough with an order I love just buying shrimp and crab and making it at home
I agree. Their food is sub-par at best in my opinion. I like seafood boils, have you ever been to one or hosted one?
I have not, what do you do if you do it at home?
There are many techniques, but in general it involves boiling a large pot of seasoned water with shellfish, corn, potatoes or other vegetables. 
Is it like a fondue where it sits in the middle of the table, and everyone puts in and takes out what they want?
It's actually bigger than that. It's done outside, because it's like a 15 gallon pot of boiling water. Once done the food is then dumped on a table and eaten community style.