Certainly, the value of the catch is part of that. You can see that some of the tuna catch goes for thousands of dollars per fish and the income you can receive for that.
For organized crime, there is also the context of using fishing vessels that appear to be engaged in fishing, but there are opportunities to take advantage of potential arms trafficking or drug trafficking associated with the fishing vessel. Typically, those types of fishing vessels that might be involved with that have a master or owners who do not operate at all times in compliance with fisheries' rules and regulations.