Freshwater

African jewelfish

Hemichromis bimaculatus

The body of the African jewelfish is elongated and tall, the sides are flat.

Astyanax jordani

Anoptichthys jordani

Astyanax jordani is very close to A. mexicanus and their taxonomic affiliation is controversial. Some consider …

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.

Blotched upside-down catfish

Synodontis nigriventris

Body stocky, slightly flattened at the sides. Back more convex than abdomen, eyes large, mouth lower …

Cardinal tetra

Paracheirodon axelrodi

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

Golden pencilfish

Nannostomus beckfordi

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

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 …

Guppy

Poecilia reticulata

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

One-lined pencilfish

Nannostomus unifasciatus

The name unifasciatus comes from the Latin words uni ("one") and fasciatus ("banded"), meaning "one-banded." The …

Osteolepis macrolepidotus

Osteolepis macrolepidotus was a lobe-finned fish (Sarcopterygii) with a broad, flattened head and a tapering body …

Paradise fish

Macropodus opercularis

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

Pearl gourami

Trichopodus leerii

The Pearl gourami has an elongated, oval-shaped body that is strongly compressed laterally.

Pyrrhulina filamentosa

Pyrrhulina filamentosa

Pyrrhulina filamentosa has an elongated body with a large caudal fin, the upper lobe of which …

Sumatra barb

Puntigrus tetrazona

These barbs have tall, strongly compressed bodies. There are no whiskers. Females are larger than males …

Three spot gourami

Trichopodus trichopterus

In terms of body shape and fin structure, the fish resembles the pearl gourami, but its …

Three-lined pencilfish

Nannostomus trifasciatus

The genus name Nannostomus comes from the Greek nannos ("dwarf") and the Latin stomus ("mouth"), referring …

Zebrafish

Danio rerio

The body shape of the zebrafish is fusiform, with compressed lateral sides and a superiorly oriented …