List of fish of the Mediterranean Sea consists of 712 species of fish.
As of March 2015, the IUCN Red List of Threatened Species identified 6087 data deficient species in the Chordata phylum.
On 29 January 2010, the IUCN Red List of Threatened Species identified 2657 near threatened species, subspecies, stocks and sub-populations in the Animalia kingdom.
In the 10th edition of Systema Naturae, Carl Linnaeus described the Pisces as:
Always inhabiting the waters; are swift in their motion and voracious in their appetites. They breathe by means of gills, which are generally united by a bony arch; swim by means of radiate fins, and are mostly covered over with cartilaginous scales. Besides the parts they have in common with other animals, they are furnished with a nictitant membrane, and most of them with a swim-bladder, by the contraction or dilatation of which, they can raise or sink themselves in their element at pleasure.
Palma Aquarium is a commercial aquarium and park that first opened in 2007 in Palma, Mallorca, Spain. The aquarium is the property of Coral World International. The aquarium is 500 m (1,600 ft) from Playa de Palma beach, and includes 55 tanks which are home to over 700 different species from the Mediterranean Sea and the Indian, Atlantic and Pacific Oceans. One tank, "Big Blue" is 8.5 m (28 ft) deep, the deepest shark tank in Europe, and it also contains the largest collection of live coral in Europe The park was awarded "Best Business Initiative in the Balearics 2007", awarded by Actualidad Económica magazine, and was awarded the "2007 Accessibility Prize" by the Consell de Mallorca.