Attack of the Crab!

It was huge! It was eight feet long with giant red pinchers! It had huge fangs and....well, no not really. But we did see a large local crab species today. The U.S. coast equivalent would be a blue crab. While Munchkin #1 built a sand fort with an irrigation system/network of canals, the husband, Munchkin #2 and I went snorkeling. We came across a nice sized crab (back was 5-6 inches across). It was the same local species one finds in the fish markets for dinner here. Their 'claws/pinchers' are tipped with red. The front legs/pincher legs stretched out a total length across from tip to tip of about 12 inches. Well, the three of us decided to chase him when he scuttled off across the bottom. Since Munchkin #2 does not yet have the speed for that kind of chase, I hung back with her. The husband chased the crab and managed to get it to circle back towards Munchkin #2 and myself. Well, the water was about 3 1/2 feet deep. I was floating on my back with my legs stretched and spread out, yet under the water watching this crab head straight for me. Well, that little critter (who you just know was screaming to itself, "DON'T EAT ME!") ran right under me between my spread and outstretched legs. All I could think was, "OH NO! It's gonna pinch my behind!" I screeched through my snorkel and splashed quite a bit MUCH to the amusement of my husband and Munchkin #2. By the time we saw the crab, my camera's battery was used up (rats!). But, I did manage to get a picture of three of our well camouflaged little local fish with the yellow tails with a black tip (see above). They are swimming parallel to one another, and they are facing to the left. I had to 'doctor' the tint/color/contrast of the pic a bit because these little guys are almost the same color as the sandy bottom. The tide was very low when we went out today. The water wasn't super clear, but it was still fun. Wish I'd been able to get a snap of that crab though.
I found a nice little bit on this crab species at Wikipedia:
http://en.wikipedia.org/wiki/Blue_swimmer