Aquarium fish

Achilles tang

Acanthurus achilles

The Achilles tang has an elongated, oval body with a steep dorsal head profile. The small, …

Amur bitterling

Rhodeus sericeus

The Amur bitterling is a small fish with a deep, laterally compressed body, large scales, and …

Banded gourami

Trichogaster fasciata

The banded gourami has an elongated, strongly compressed body with an egg-shaped profile. The mouth is …

Black Molly

Poecilia sphenops

The Black Molly has an elongated body. Females tend to be more rounded in appearance. The …

Black tetra

Gymnocorymbus ternetzi

The black tetra has a flat, tall body.

Black-blotched porcupinefish

Diodon liturosus

The body of the Black-blotched porcupinefish is elongated with a spherical head and large, round, forward-projecting …

Blue leopard corydoras

Corydoras paleatus

The Blue Leopard Corydoras has a strongly curved back line and an almost flat abdomen. Its …

Bushymouth catfish

Ancistrus dolichopterus

The Bushymouth catfish has a flattened body that is completely covered in polygonal bony plates. Its …

Cardinal tetra

Paracheirodon axelrodi

The Cardinal tetra has an elongated body that is slightly flattened on the sides. The females …

Cascarudo

Callichthys callichthys

Cascarudo has an elongated, slightly flattened body covered with two rows of bony plates. It has …

Constancia’s seasonal killifish

Cynolebias constanciae

The body of Constancia's seasonal killifish (Cynolebias constanciae) is elongate and slightly laterally compressed.

Eastern bottle-nosed mormyrid

Mormyrus longirostris

The eastern bottle-nosed mormyrid has such a distinctive appearance that it cannot be confused with any …

Eastern mosquitofish

Gambusia holbrooki

The body of the Eastern mosquitofish is moderately elongated, not tall, and laterally compressed. It is …

Foureye butterflyfish

Chaetodon capistratus

The foureye butterflyfish has a body that is compressed laterally. The upper part of the head …

Fourspine stickleback

Apeltes quadracus

The fourspine stickleback possesses an elongated, fusiform body lacking scales. Typically, it exhibits four or five …

Goldfish

Carassius auratus

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

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 …

Guppy

Poecilia reticulata

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

Holocentrus adscensionis

Holocentrus adscensionis

The squirrelfish has a fusiform (spindle-shaped) body that is oblong and moderately compressed. The head is …

Malabar danio

Devario malabaricus

The Malabar danio has a fusiform (spindle-shaped) body and is a larger, more robust relative of …

Neon tetra

Paracheirodon innesi

The neon tetra has a small, slender, and partially transparent body. The fish is characterized by …

Pajama cardinalfish

Sphaeramia nematoptera

The pajama cardinalfish has a tall, deep body and a large, upper mouth.

Paradise fish

Macropodus opercularis

This species exhibits sexual dimorphism. Males are larger than females and possess elongated filaments on their …