Fish beginning with I

Iberian barbel - The Iberian Barbel is a ray-finned fish species in the family Cyprinidae.

Iberian nase - The Iberian Nase is a species of ray-finned fish in the Cyprinidae family.

Iberian-chub - Squalius pyrenaicus is a ray-finned fish species in the family Cyprinidae.

Iberian-loach - Cobitis paludica is a species of ray-finned fish in the Cobitidae family.

Iberian-roach - Its natural habitats are rivers and intermittent rivers.

Iheringichthys labrosus - Both species of Iheringichthys are distributed in the Paraná River basin.

Imposter trevally - The imposter trevally is classified within the genus Carangoides, one of a number of groups of fish referred to as jacks and trevallies.

Indian cat shark - Reproduction is oviparous.

Indian coolie-loach - Indian Coolie-Loach is a species of ray-finned fish in the genus Pangio.

Indian deepwater dragonet - Indian deepwater dragonet is a species of ray-finned fish in the genus Callionymus.

Indian glassy fish - The Indian glassy fish has a striking transparent body revealing its bones and internal organs; the male develops a dark edge to the dorsal fin.

Indian mackerel - The Indian mackerel is found in warm shallow waters along the coasts of the Indian and Western Pacific oceans.

Indian mottled eel - Anguilla bengalensis is a species of eel in the genus Anguilla of the family Anguillidae and consists of two sub-species.

Indian river shad - Gudusia chapra is a shad of the Clupeidae family,

Indian sillago - The Indian whiting is one of 29 species in the genus Sillago, which is one of three divisions of the smelt whiting family Sillaginidae.

Indian swellshark - The Indian swellshark, Cephaloscyllium silasi, is a catshark of the family Scyliorhinidae found in the western Indian Ocean from Quilon, India and Sauqira Bay, Oman between latitudes 16° N and 10° N, from the surface to 300 m.

Indian threadfish - The Indian threadfish is one of three members of the diamond trevally genus Alectis, which itself is one of 33 genera encapsulated in the jack family, Carangidae.

Indian triggerfish - The Indian triggerfish usually feed on hard-shelled mollusks and echinoderms but some feed on algae and zooplankton.

Indian vagabond butterflyfish - The Indian Vagabond Butterflyfish, Chaetodon decussatus, is a species of butterflyfish .

Indo-pacific sailfish - It is theorized by marine biologists that the 'sail' of the sailfish may serve the purpose of a cooling and heating system for this fish; this due to a network of a large number blood vessels found in the sail and because of "sail-raising" behaviour exhibited by the sailfish at of near the surface waters after or before high-speed bursts.

Indochina featherback - The Royal Knifefish , also called Indochina Featherback, is a species of fish in the Notopteridae family.

Indonesia speckled carpetshark - It is nocturnal, hiding in reef crevices during the day.

Indonesian bamboo shark - Hasselt's bamboo shark, Chiloscyllium hasseltii, is a bamboo shark in the family Hemiscylliidae found around Thailand, Malaysia and Indonesia, between latitudes 23° N and 10° N, and longitude 91° E and 133° E.

Indonesian shortfin eel - Anguilla bicolor is a species of eel in the genus Anguilla of the family Anguillidae consisting of two sub-species.

Indoreonectes evezardi - Indoreonectes evezardi is a species of ray-finned fish in the Balitoridae family.

Inlecypris jayarami - Inlecypris jayarami is a fairly recently discovered danionin from Lake Inle.

Inotted lizardfish - The Inotted lizardfish which is also known as Synodus evermanni is a type of lizardfish or Synodontidae that lives mainly in the Eastern Pacific.

Inshore hagfish - The inshore hagfish is found in the Northwest Pacific, from the Sea of Japan and across eastern Japan to Taiwan.

Intermediate sillago - The Thai whiting is one of 29 species in the genus Sillago, which is one of three divisions of the smelt whiting family Sillaginidae.

Interochromis loocki - Interochromis loocki is a species of fish endemic to Lake Tanganyika in East Africa.

Iodotropheus stuartgranti - Iodotropheus stuartgranti is a species of fish in the Cichlidae family.

Iran cave barb - Iranocypris typhlops is a species of ray-finned fish in the Cyprinidae family, the only member of the monotypic genus Iranocypris.

Iranocichla hormuzensis - Iranocichla is a monotypic genus of mouthbrooding cichlid fish with a single species, Iranocichla hormuzensis.

Iraq blind barb - Typhlogarra widdowsoni is a species of ray-finned fish in the Cyprinidae family, of the monotypic genus Typhlogarra.

Irish pollan - The pollan isis now considered to a distinct species, but it sometimes is classed as a subspecies of the Arctic cisco Coregonus autumnalis, which is not present elsewhere in Europe, but has anadromous populations in Arctic Siberia, Alaska, and Canada.

Ironcolor shiner - Ironcolor Shiner is a species of ray-finned fish in the genus Notropis.

Irrawaddy river shark - The Irrawaddy river shark, Glyphis siamensis, is a species of requiem shark, family Carcharhinidae, known only from a single museum specimen originally caught at the mouth of the Irrawaddy River in Myanmar.

Ischikauia steenackeri - Ischikauia steenackeri is the only species of cyprinid fish, in the monotypic genus Ischikauia.

Isistius labialis - Reproduction is aplacental viviparity in the same way as great white sharks.

Island gudgeon - The island gudgeon is a species of fish in the Eleotridae family.

Island trevally - The island trevally is classified within the genus Carangoides, a group of fish commonly called jacks and trevallies.

Isparta minnow - The Saz Baligi is an enigmatic and possibly extinct ray-finned fish species in the family Cyprinidae.

Issyk-kul dace - Issyk-Kul Dace is a species of ray-finned fish in the genus Leuciscus.

Issyk-kul marinka - This species has a subspecies Schizothorax pseudoaksaiensis pseudoaksaiensis.

Italian Barbel - Its natural habitats are rivers and freshwater lakes.

Italian bleak - The Italian Bleak or White Bleak is a species of ray-finned fish in the Cyprinidae family.

Italian Loach - The Italian Loach is a species of ray-finned fish in the Cobitidae family.

Italian nase - The Italian Nase is a species of ray-finned fish in the Cyprinidae family.

Iwame trout - Oncorhynchus iwame Kimura & Nakamura, 1961

Ixinandria steinbachi - Ixinandria steinbachi is the only species in the genus Ixinandria of catfish of the family Loricariidae.

Izak catshark - The Izak catshark, Holohalaelurus regani, is a cat shark of the family Scyliorhinidae, found in the southeast Atlantic and western Indian Ocean, from southern Namibia to southern Mozambique, and Kenya and Somalia, between latitudes 4° S and 37° S, at depths of between 160 and 740 m.

Izu cat shark - The Izu cat shark, Scyliorhinus tokubee, is a cat shark of the family Scyliorhinidae found only around Japan, at depths down to 100 m.

Izu stingray - The Izu stingray was described by Kiyonori Nishida and Kazuhiro Nakaya in a 1988 issue of the Japanese Journal of Ichthyology.