I wouldn't enter any spearfishing competition with the way they're measured at present, first of all because I'd just feel wrong about killing so many wrasse and secondly because I believe it goes against why I started spearfishing in the first place -- to appreciate my surroundings and get a glimpse of the rest of the world below the water.
I don't do it to impress other people and although it's nice to gain some admiration for what you do, I would much prefer to gain that admiration by having a nice fish on the table for dinner between some fellow divers, friends and family than going out to shoot a lot of fish for a magazine photo.
Where I go spearfishing during the summer months, we are frowned upon by locals whenever a spearo comes off the boat and the grumbling begins amongst them. 99% of spearo's that go to the same place as me during the summer will not find the locals to be of any help because they will be too apprehensive of you and your intentions.
It's only after diving there for 10+yrs now that I've been accepted because they know what I'm like when I get in the water and have a respect for the sea and its ecosystem. Most importantly, they know what I take and always eat what I catch. So many people are there, shooting anything that moves and it just brings a tear to my eye and that of the locals (who are VERY protective of their livelihood - fishing!)
I suppose the other thing that helped was I never asked the locals about good spots because I know how protective they are of them. I did my own homework and discovery of that playground and now I get fishermen asking me where I've seen the fish at! I've even taken some of them out snorkelling with me just so they could admire some fish in their natural habitat and they were shocked to discover that I dived a lot without my speargun purely for admiration and observation.
Back to the topic -- I think competitions need to have different ratings for their fish to stop the mass slaughtering that does happen at any given site at present. You will never see a spearfishing competition where I dive during the Summer -- ever and that makes me feel warm and fuzzy inside.
sidenote: Wrasse do make good eating and here's a nice tip I got from some locals in France (go for the orange coloured ones, the bigger the better, steer clear of green -- orange has nicer flesh)
I eat them but it's very rare, sometimes a local will ask me for one and I'll be only too happy to oblige. Last time I had Wrasse was during the summer in france and it wasn't cooked (really), it was made a la cubaine and a la tahitienne (different mixes of oils, vinegar, lime, lemon, fresh veg with some mackerel) and it was delicious. Time before that it was cooked in an oven with tomatoes, onions and other mixed veg/spices and that wasn't too bad either!
I'll be laying the smackdown on anybody else that says wrasse don't make good eating :ko