The slimy sculpin is a freshwater species of fish belonging to the family Cottidae, which is the largest sculpin family. They usually inhabit cold rocky streams or lakes across North America, ranging from the Great Lakes, southeast Minnesota, northeast Iowa, southwest Wisconsin and northeast Canada. Slimy sculpins have also been found roaming the cold streams of eastern Siberia. They are commonly confused with their closely related relatives, Mottled sculpin, and with tubenose gobies who are both freshwater fishes as well. The slimy sculpin is a nocturnal fish that usually spends most of its time on the stream bottom and seeks shelter under rocks and logs, especially during spawning season. When it swims, it sometimes appears to be "hopping" along the bottom because of its inefficient ability to swim. This is partly due to the absence of a swim bladder, which normally gives buoyancy to a fish.
The sand goby, also known as a polewig or pollybait, is a species of ray-finned fish native to marine and brackish European waters from the Baltic Sea through the Mediterranean Sea and into the Black Sea where it occurs in sandy or muddy areas of inshore waters at depths of from 4 to 200 metres. This species can reach a length of 11 centimetres (4.3 in) TL. This species is sometimes kept in public aquariums. The sand goby is of a sandy colour, with darker markings on the sides and a creamy-white underside. In the breeding season the male fish has blue spot at the rear of the first dorsal fin, ringed with white. The fish has a slender body, and the head is about a quarter of the total length.
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.
Awaous macrorhynchus is a species of goby endemic to Madagascar where it is known from brackish and fresh waters. This species can reach a length of 38 centimetres (15 in) TL.
Awaous is a genus of fish in the family Gobiidae, the gobies. They are native to fresh, marine and brackish waters from Africa to the Americas.
Awaous stamineus, commonly known as ‘O‘opu nakea, is a species of goby native to the Hawaiian Islands. It has been previously considered a synonym of Awaous guamensis but recent work based upon morphological and genetic differences has recognized Hawaiian populations as being distinct. Consequently, Hawaiian Awaous are now recognized as a valid, distinct species.
The Hawaiian freshwater goby, or ʻOʻopu, is a species of goby endemic to Hawaii, commonly located in freshwater mountain streams in higher elevations.
Sicyopterus stimpsoni, commonly known as the Nopili rockclimbing goby, oopu nopili, or Stimpson's goby, is a species of amphidromous goby endemic to the islands of Hawai‘i. This species can reach a length of 19.8 centimetres (7.8 in) SL.
The two-spotted goby is a species of goby native to marine and brackish waters of the eastern Atlantic Ocean where it can be found from the Faeroes and Norway to the northwestern coast of Spain. It has also been recorded from Estonia though records from the Mediterranean Sea are uncertain. They are common on all coasts of the United Kingdom. This species can reach a length of 6 centimetres (2.4 in) TL.
Awaous acritosus, the Roman nose goby, is a species of goby that is native to fresh water rivers and streams of Queensland, Australia and the Laloki River drainage of New Guinea.
Awaous banana, the river goby, is a species of goby native to fresh and brackish water stream and rivers from the southern United States through Central America to Venezuela and Peru. This species can reach a length of 30 centimetres (12 in) SL. It is important to local commercial fisheries.
Awaous flavus is a species of goby native to fresh and brackish waters of rivers and estuaries of South America from Colombia to near the mouth of the Amazon River in Brazil. Males of this species can reach a length of 8.2 centimetres (3.2 in) SL while females only reach 7.6 centimetres (3.0 in) SL.
Awaous grammepomus, the Scribbled goby, is a species of goby native to freshwater streams and rivers and brackish estuaries from Sri Lanka to New Guinea with a report of it occurring in Palau. This species can reach a length of 15 centimetres (5.9 in) SL. It is of minor importance to local commercial fisheries and can also be found in the aquarium trade.
Awaous ocellaris is a species of goby native to fresh, marine and brackish waters of southern Asia from India to the Philippines, and eastern Asia to Japan as well as the islands of Oceania. This species can reach a length of 13 centimetres (5.1 in) TL. It is of minor importance to local commercial fisheries.
Awaous tajasica, the sand fish or sandfish, is a species of goby native to fresh and brackish waters of Brazil in South America with reports outside of Brazil considered to be questionable. This species can reach a length of 16.3 cm (6.4 in) SL.
Stenogobius hawaiiensis, the Naniha goby, is a species of goby endemic to the Hawaiian Islands where it can be found in marine, brackish and fresh waters. This species is not as adept a climber as are many other Hawaiian gobies and thus is not found in the upper reaches of streams. This species can reach a length of 11.4 centimetres (4.5 in) SL. In the Hawaiian language, it is also known as O'opu naniha. It feeds on invertebrates such as worms, crustaceans and insects as well as algae. It is preyed upon by birds such as the black-crowned night-heron as well as native fishes such as Caranx spp., Polydactylus sexfilis and Sphyraena barracuda. Invasive alien fish such as mosquito fish and game species threaten the populations of S. hawaiiensis by bringing new diseases and parasites and by predating on their eggs and fry. They may also be threatened by alteration of their habitat by humans such as abstraction, pollution and damming but not to as great an extent as these factors affect other native Hawaiian freshwater fish, there is also some fishing for this species.
Awaous melanocephalus, the largesnout goby, is a species of goby that is native to fresh water rivers and streams of India, Sri Lanka, Ryukyu Islands, China, Taiwan, Vietnam, Thailand, Philippines, Indonesia, Papua New Guinea and Solomon Islands. Some suggestions has been recorded from Fiji islands and Mauritius, but not confirmed yet.
Awaous aeneofuscus, the freshwater goby, is a species of goby found in East Africa.
Awaous personatus is a species of goby found in Indonesia.
Awaous fluviatilis is a species of goby found in the Indian Ocean.
