Garibaldi glow. Not they themselves, but when you're out in kelp beds, looking down, twirling your legs among the sea grasses - I suppose it's the way the light filters through the water and bounces off their orange and the kelp's golden-y ochre-ness, it creates a nebulous halo about them.
You can check out how I painted the sides of this canvas here, to get at that submerged feeling.