Those crabs are forest crabs. Believe it or not they're actually deadly ! They are in reality pale beige but they get this red color from a plant they eat in the forest. Although there are no poisonous animals in Cuba, feeding from this plant makes their flesh poisonous. As per usual in nature, bright colors mean danger. If anyone missed it in the previous crab post: They live kilometers away from the sea and the only reason they ever go to the sea is to reproduce and lay eggs. At mating season, the crabs start heading towards the sea, crossing roads and risking their lives, to bring back droplets of salt water in their claws. Back to the forest, the reproduction happens and later, the females travel again all the way to the sea to lay their eggs in the sand. Respect.