Whats a good boat for family and fishing?

I'm looking for a boat atleast 18' boat thats strong and reliable. I'm looking for something in the $15,000 range. I would like it to be a good boat for the family and then a good boat for when I go fishing. Any suggestions? Thank you.
This would be for the ocean. Basically I want a boat that can sleep two people so I could fish while my family sleeps at night.