Crustacean (Barnacles, shrimps, hermit crabs, crabs, lobster)

Crustaceans form a very large group of arthropods, which includes such familiar animals as crabs, lobsters, crayfish, shrimps, krill and barnacles.

Plesionika narval - Narwhal shrimp - Μονόκερη γαρίδα

Dardanus calidus - Red Hermit Crab - κόκκινος Ερημίτης κάβουρας

Scyllarides latus - Slipper lobster - Καραβίδα

Pagurus anachoretus - Αναχωρητής κάβουρας

Identified until now

From Wikipedia

An arthropod (from Greek arthro-, joint + podos, foot) is an invertebrate animal having an exoskeleton (external skeleton), asegmented body, and jointed appendages. Arthropods form the phylum Arthropoda, and include the insects, arachnids,myriapods, and crustaceans. Arthropods are characterized by their jointed limbs and cuticle made of chitin, often mineralised with calcium carbonate. The arthropod body plan consists of segments, each with a pair of appendages. The rigid cuticle inhibits growth, so arthropods replace it periodically by moulting. Their versatility has enabled them to become the most species-rich members of all ecological guilds in most environments. They have over a million described species, making up more than 80% of all described living animal species, some of which, unlike most animals, are very successful in dry environments

Crustaceans (Crustacea /krʌˈsteɪʃə/) form a very large group of arthropods, usually treated as a subphylum, which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill and barnacles.

The 67,000 described species range in size from Stygotantulus stocki at 0.1 mm (0.004 in), to the Japanese spider crab with a leg span of up to 3.8 m (12.5 ft) and a mass of 20 kg (44 lb). Like other arthropods, crustaceans have an exoskeleton, which they moult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates, by the possession of biramous (two-parted) limbs, and by their larval forms, such as the nauplius stage of branchiopods and copepods.