**2. Some aquatic species with an economic aspect**

Aquaculture can be obtained almost anywhere there is water. Especially in regions where temperate climate is dominant, the diversity of these products is increasing. While only fish and its derivatives are consumed in some places, less preferred foods such as octopus and even plants grown in the sea are consumed in some cuisines of the world.

Aquaculture means the products obtained from the species such as fish, mollusks, crustaceans, mammals, reptiles, sponges, and aquatic plants produced naturally or artificially in seas, inland waters and artificial pools, dams, ponds, fisheries, and fishing facilities. Some of the economical shellfish species found in the seas are explained below [5].

Gastropods; Sea snail (*Rapana thomasiana,* Gross 1861) (**Figure 1**) [6].

Cephalopods; Octopus (Octopus vulgaris, Linnaeus 1758, **Figure 2**), The European Squid (Loligo vulgaris, Lamarck 1798), The Common Cuttlefish (Sepia officinalis, Linnaeus 1758) [7].

Bivalves; Mussel (Mytilus galloprovincialis), Oyster (Ostrea edulis), Akivades (Tapes decussatus), Kidonia (Venus verrucosa), Sand mussel (Venus gallina) [8, 9].

Crustaceans; Shrimp (*Penaeus keathurus*), Insect (*Palinurus vulgaris*), Crayfish (*Astacus leptodactylus*), Spiny crab (*Maia squinada*), Blue crab (*Callinectes sapitus*), Lobster (*Homarus gammarus*) [10–13].
