Oscar just got scary...molted last night and is rather a lot larger now! It's been a long time since I've seen a crab increase that much in body mass in a single molt. I'll have to get pics of Oscarzilla when I get home today.
Update pic. Oscar still enjoys destroying the occasional algae ball (remnants of one from a couple weeks ago visible in the back). Definitely a she too...although not visible in this pic, she has eggs right now. They are some of the smallest Crustacean eggs I have ever seen, like bright red sand grains.