Within the Cichlidae family, Apistogramma is the most species-rich genus, which explains why they are also the most popular in the aquarium hobby. Due to their vibrant colors, Apistogramma like the gold agassiz’s dwarf cichlid has been highly sought after.

Within the Cichlidae family, Apistogramma is the most species-rich genus, which explains why they are also the most popular in the aquarium hobby. Due to their vibrant colors, Apistogramma like the fire red agassiz’s dwarf cichlid has been highly sought after.

Within the Cichlidae family, Apistogramma is the most species-rich genus, which explains why they are also the most popular in the aquarium hobby. Due to their vibrant colors, Apistogramma like the agassiz's dwarf cichlid has been highly sought after.

Since their introduction in the early 1900s, the golden harlequin rasbora has become the most common species of rasbora kept within the aquarium hobby. Their scientific name Heteromorpha actually refers to its rather distinctive color pattern, which is undoubtedly the reason this species gained so much popularity.

Since their introduction in the early 1900s, the black harlequin rasbora has become the most common species of rasbora kept within the aquarium hobby. Their scientific name Heteromorpha actually refers to its rather distinctive color pattern, which is undoubtedly the reason this species gained so much popularity.

Since their introduction in the early 1900s, the purple harlequin rasbora has become the most common species of rasbora kept within the aquarium hobby. Their scientific name Heteromorpha actually refers to its rather distinctive color pattern, which is undoubtedly the reason this species gained so much popularity.

Since their introduction in the early 1900s, the harlequin rasbora has become the most common species of rasbora kept within the aquarium hobby. Their scientific name Heteromorpha actually refers to its rather distinctive color pattern, which is undoubtedly the reason this species gained so much popularity.

Due to their light-colored scales with black markings, bandit corydoras often look phenomenal in aquariums with darker substrates. They are also a species of catfish that are frequently active, particularly at feeding time and in the evenings.