Clownfish or anemonefish are fishes from the subfamily Amphiprioninae in the family Pomacentridae. Thirty species are recognized: one in the genus Premnas, while the remaining are in the genus Amphiprion. In the wild, they all form symbiotic mutualisms with sea anemones. Depending on species, anemonefish are overall yellow, orange, or a reddish or blackish color, and many show white bars or patches. The largest can reach a length of 17 cm (6.7 in), while the smallest barely achieve 7–8 cm (2.8–3.1 in).
The round goby is a fish. Defined as a euryhaline bottom-dwelling goby of the family Gobiidae, it is native to central Eurasia, including the Black Sea and the Caspian Sea. Round gobies have established large non-native populations in the Baltic Sea, several major Eurasian rivers, and the North American Great Lakes.
Actiniidae is the largest family of sea anemones, to which most common, temperate, shore species belong. Most members of this family do not participate in symbioses with fishes. Three exceptions are the bubble-tip anemone, snakelocks anemone and Urticina piscivora.
The black goby is a species of ray-finned fish found in the Eastern Atlantic and Mediterranean Sea and Black Sea. It inhabits estuaries, lagoons, and inshore water over seagrass and algae. It feeds on a variety of invertebrates and sometimes small fish. This species can also be found in the aquarium trade.
Gobius is a genus of fish in the family Gobiidae native to fresh, brackish and marine waters of and around Europe, Africa and Asia. It contains the typical gobies, being the type genus of the formerly recognised subfamily Gobiinae and family and the namesake genus of its order Gobiiformes.
The snakelocks anemone is a sea anemone found in the eastern Atlantic Ocean and the Mediterranean Sea. The latter population is however sometimes considered a separate species, the Mediterranean snakelocks anemone.
The rock goby is a small coastal goby of eastern Atlantic waters, from Scotland to Senegal. It is also reported from the Mediterranean and Black Seas, and is an anti-Lessepsian migrant in the Gulf of Eilat and Red Sea. There are unconfirmed records from the area around Pointe Noire in Congo-Brazzaville.
The giant goby is a species of goby native to coastal marine and brackish waters of the eastern Atlantic, the Mediterranean Sea and the Black Sea at depths of from 10 to 35 metres. This species is of minor importance to commercial fisheries and is also popular as a game fish.
Sea anemones are the marine, predatory animals of the order Actiniaria. They are named after the anemone, a terrestrial flowering plant, because of the colourful appearance of many. Sea anemones are classified in the phylum Cnidaria, class Anthozoa, subclass Hexacorallia. As cnidarians, sea anemones are related to corals, jellyfish, tube-dwelling anemones, and Hydra. Unlike jellyfish, sea anemones do not have a medusa stage in their life cycle.
Pinchuk's goby is a species of goby native to the Black Sea and the Sea of Azov.
The golden goby is a species of goby from the family Gobiidae endemic to the Mediterranean Sea. It prefers areas with rocky substrates at depths of from 5 to 80 metres with plentiful growth of algae and gorgonians. This species can reach a length of 10 centimetres (3.9 in) TL. It can also be found in the aquarium trade. Gobius xanthocephalus is the name that is applied to the populations of similar gobies in the eastern Atlantic and western Mediterraean which were previously considered to be G. auratus.
Bucchich's goby is a species of goby native to the Eastern Mediterranean Sea and perhaps the Black Sea. It has traditionally been considered to be more widespread, but in 2016 the similar incognito goby was described. It had been confused with the Bucchich's goby and much information formerly published for this species is now considered to actually be for the incognito goby.
The yellow-headed goby is a species of goby native to the eastern Atlantic Ocean from northern Spain to Madeira and Canary Islands, and also in the Mediterranean Sea where it is found in inshore waters at depths of from 1 to 22 metres and can be found living under stones. This species can reach a length of 10 centimetres (3.9 in) TL.
Gobius fallax, or Sarato's goby, is a species of goby native to the Mediterranean Sea where it is found in inshore waters in locations with rocks and crevices for shelter at depths of from 0 to 32 metres. This species can reach a length of 9 centimetres (3.5 in) TL. There is a single record from the Canary Islands.
The striped goby is a species of goby native to the Mediterranean Sea where it occurs on coralline grounds at depths of from 15 to 85 metres though normally not deeper than 50 metres (160 ft). This species can reach a length of 5.8 centimetres (2.3 in) SL. This species can also be found in the aquarium trade.
Gobius roulei, Roule's goby, is a species of goby native to the eastern Atlantic Ocean and the Mediterranean Sea where it can be found at depths of from 320 to 385 metres. This species can reach a length of 8 centimetres (3.1 in) TL. The specific name honours the French zoologist Louis Roule (1861-1942) who was the collector of the type.
Couch's goby is a species of goby native to the northeastern Atlantic Ocean as far north as southern Great Britain and Ireland, the Mediterranean Sea and the Adriatic Sea where it can be found living under stones on muddy sand in inshore waters and in the intertidal zone. This species can reach a length of 7.7 centimetres (3.0 in) TL. The specific name and common name both honour Jonathan Couch (1789-1870), the Cornish ichthyologist and the author of A History of the Fishes of the British Islands published between 1862 and 1867.
The slender goby is a species of goby endemic to the Mediterranean Sea where it can be found in inshore waters to a depth of about 30 metres (98 ft). It lives in areas with sandy or muddy substrates near beds of sea-grass. This species can reach a length of 16 centimetres (6.3 in) TL.
Paracentrotus lividus is a species of sea urchin in the family Parechinidae commonly known as the purple sea urchin. It is the type species of the genus and occurs in the Mediterranean Sea and eastern Atlantic Ocean.
Crystallogobius linearis, the crystal goby, is a species of goby native to the Atlantic coasts of Europe and the Mediterranean Sea where it can be found at depths of from 1 to 400 metres. Males of this species grow to a length of 4.7 centimetres (1.9 in) SL while females only reach 3.9 centimetres (1.5 in) SL. This species is the only known member of its genus. The name Crystallogobius comes from the Latin words cristallum, meaning "crystal", and gobius, meaning gudgeon.
