Well do you? Is it as big as the fish you might have had, say, 50 years ago? 100 years ago? From The Oil Drum comes this post about how we have wrecked the ocean. You can watch the video or read the transcript. Sobering either way.
The Earth is one big system of life. Everything is interconnected and in relationship. Those relationships change and evolve as the environment we live in changes and not necessarily for the good. The problem with humans is that, as a species, we are incredibly myopic. There are way too many of us who don't see the relational aspect of being on this planet and, as a consequence, don't understand or dismiss the impact of the changes that occur. We may see only one species die out and think it is nothing, but the effects could be fare more devastating, as in the case of the relationship between the sea urchin and the coral.
We are too many and we want too much. The ultimate price will be a failed planet or a die-off of the many until there are just enough for the Earth to support. We are so smart and so blind. The people who live by fishing will become fewer, and what jobs will be there for the ones who can no longer fish?
Got fish? Maybe you shouldn't. Maybe we need to just leave the fish alone.