These guys look great. I love anthropomorphic races (I've thrown out almost all 4e races for my campaign world and substituted my own) and these guys fit in great with a theme I will be using in the mid-heroic levels - a new continent on the southern side of the sea.
As for questions/comments, I always thought of Tridents as being versatile. That would solve problems with nets, as well as still allow them to act as they should, wouldn't it? Just a thought.
When I use the monsters, I'll tell you how your controller plays out.