The Blue Spider is a great candidate for the aquaterrarium and is scientifically also called Neosarmatium rotundifrons. Originally this mangrove crab comes from Australia, but is also found in East Africa or Southeast Asia. It lives amphibious and is therefore great for the aquaterrarium. Its impressive appearance makes it an interesting eye-catcher, which one likes to observe. This pretty and colorful crab is quite social and can be kept as a pair, but also in groups, it is quite sociable. It reaches a body size of about 5 cm. The males can be recognized by their usually somewhat larger and more colorful claws, also their abdominal valve is V-shaped…