Majoidea

Majoidea is a superfamily of brachyuran crabs, commonly known as decorator crabs. This diverse group includes over 1000 species found in marine environments worldwide. A defining characteristic of Majoidea is their remarkable ability to camouflage themselves by attaching various materials from their surroundings to their carapace and limbs. This can include algae, sponges, hydroids, and other sessile organisms, which not only help them blend in but may also provide protection or attract prey.

The superfamily is divided into several families, including Majidae, which is the largest and most well-known. These crabs exhibit a wide range of body shapes and sizes, but many are characterized by long, slender legs and a triangular or ovate carapace. Their feeding habits vary, with some being scavengers, others active predators, and some feeding on algae. Majoidea are an important component of many marine ecosystems, playing roles in nutrient cycling and as a food source for other animals. Their elaborate camouflage strategies have made them a subject of fascination for both scientists and the general public.