Sometimes it's good to be a land animal. Especially a reasonably sizeable one. Take the beach for example. We can go there and play in the sand, build our castles and frolic under the Sun in near total safety. Sure you might get sunburnt or find grains of sand in your hair for days to come, but you probably won't get eaten. I mean, imagine if you were just walking along the seaside and a massive patch of sand reared up, its rapacious mouth ablaze with hunger as it gobbled you up. That would be horrible!