In one tank piled up with layers of stones, the swimming crab Matuta victor is swimming a sideways breaststroke; in another, the rare corystid crab Jonas distincta is doing a backstroke in pursuit of little fish.
以細砂、石頭一層層堆疊的水箱裡，有著奇怪名字的「頑強黎明蟹」正打橫著游蛙式；稀有的「顯著瓊娜蟹」則肚子朝上以仰式追捕小魚。