Yes, the second one is the Wasaki sub, well, I've tried it and got very fine results, I don't really care about the pitch angles, and that. If it can dive, I'm on it! Also, be sure to dap some glue on the O-rings, sometimes, they fall out and can weaken the waterproof effect. I've seen the yellow one too except, it's made by Graupner, the wings are blue and yellow and the name is the "Mini Shark"

All these subs mentionned above are cool but they are "toys", not really to scale. The only one that looks like an actual sub will probably be the Motorworks sub.