28 Dec 12. We spent some time today with the cherubs visiting the Poulsbo Marine Science Center. The slide show on the linked page has a number of very nice images which are better by far than what I was able to capture while we were there. Part of the problem had to do with the environment and an even bigger part with operator error. Something along the line of what a good friend's father is fond of saying, "blame the Indian, not the arrow." Didn't realize until I was departing the Center that I had forgotten to check the ISO on the camera and ISO 1000 wasn't what I should have been using. On top of this were badly scratched surfaces on the tank sides requiring significant post processing image repair and very difficult lighting conditions. But in the process I did get a few usable images and the crab I'm sharing was among them. Now this crab is far different from the one I shared yesterday and is of a crab who is displaying very aggressive mating behavior. He was at the very edge of the tank and looking straight at me with both claws snapping, as if he were saying, "put your dukes up biddy." I couldn't resist taking the shot. All-in-all the experience was one which will have me returning often, but with a few additional pieces of equipment to overcome the challenges. If you are in the area it is worth a visit! Nikon D300s; 18 -200; Aperture Priority; ISO 1000; 1/6 sec @ f / 8 hand held.