Which animal is best at escaping (逃跑) from the water? It might be the octopus (章鱼). Octopus bodies are very soft (柔软的). There are no bones in their bodies. The small animal has just two little hard parts in its mouth. So it can go into very small spaces that are only a little bigger than its mouth. An octopus weighing about 230 g can pass through a 2.5-cm-wide hole, according to National Geographic.