Freshwater

Frankfish

Gymnarchus niloticus

The Frankfish has a long and slender body. It possesses four small bony gills on both …

Gar, Alligator

Lepisosteus spatula

The body of the alligator gar is long and cylindrical, covered with heavy ganoid (rhomboid) scales. …

Gar, Florida

Lepisosteus platyrhincus

The body of the Florida Gar is cigar-shaped with a broad, toothed snout. The single dorsal …

Gar, Longnose

Lepisosteus osseus

The body of the Long-billed Gar is long and slender. It has an elongated narrow bill …

Gar, Shortnose

Lepisosteus platostomus

The body is long and cylindrical, covered with ganoid (rhomboid) scales. The upper jaw has one …

Gar, Spotted

Lepisosteus oculatus

The body of the spotted gar is long and cylindrical, covered with hard ganoid (rhomboid) scales. …

Golden pencilfish

Nannostomus beckfordi

The genus name Nannostomus comes from the Latin nannus ("small") and the Greek stoma ("mouth"), referring …

Goldeye

Hiodon alosoides

The goldeye is a small fish with a compressed body that is deep in proportion to …

Goldfish

Carassius auratus

The body of the goldfish is short and tall with a slightly angular shape. It is …

Goliath tigerfish

Hydrocynus goliath

The Goliath tigerfish has a body shape similar to a tuna's. Due to their predatory nature, …

Grass pickerel, Redfin pickerel

Esox americanus vermiculatus, Esox americanus americanus

Thin and cylindrical, grass and redfin pickerel look very similar to chain pickerel, with the same …

Grayling, Arctic

Thymallus arcticus

Graceful lines, large fins and spectacular coloration make the grayling a striking fish. The most striking …

Green pufferfish

Dichotomyctere fluviatilis

The body of the green pufferfish is short and rounded, with bulging eyes and a very …

Green swordtail

Xiphophorus hellerii

Green swordtails have elongated, narrow bodies that are flattened on the sides. They also have large …

Green terror

Andinoacara rivulatus, syn. Aequidens rivulatus.

The Green Terror is a stocky fish with a prominent forehead. In adult males, a pronounced …

Gudgeon

Gobio gobio

The Latin genus name Gobio comes from the word "goby," referring to its stocky shape and …

Guppy

Poecilia reticulata

Guppies exhibit pronounced sexual dimorphism, with males and females differing in size, shape, and colouration. Males …

Herring

Clupea

Body compressed from the sides, with jagged edge of abdomen. Scales moderate or large, rarely small. …

Herring, Pacific

Clupea pallasii

The body is prostrate, compressed from the sides, covered with easily drooping scales. Abdomen rounded, ventral …

Hogsucker, Northern

Hypentelium nigricans

The Northern Hogsucker gets its name from its pig-like appearance, especially its head. It has a …

Honey sucker

Gyrinocheilus aymonieri

The scientific name was given in honour of the French linguist and explorer Étienne Aymonier (1844-1929).The …

Humpback whitefish

Coregonus pidschian

The body of the humpback whitefish becomes more pronounced with age, growing taller. A well-defined hump …

Ide

Leuciscus idus

The body of the ide is thick. It is distinguished by the following features: a shortened …

Ladyfish

Elops saurus

The ladyfish has an elongated, slender, silvery body with a blue-green back and fine scales. It …