
Apogon townsendi
Family: Apogonidae ยท Cardinalfish
Also known as: Belted Cardinalfish, Townsend's Cardinalfish, Barred Cardinalfish
The Red Belted Cardinalfish is an eye-catching species distinguished by its warm red to orange body coloration accented with bold vertical bars that run along its flanks. These dark bars create a striking banded pattern that contrasts beautifully against the reddish background, giving the fish a distinctive and immediately recognizable appearance. The fins are often tinted with matching warm tones, completing the cohesive color scheme.
This species inhabits sheltered reef environments throughout the Indo-Pacific, where it forms small aggregations among coral heads, rocky ledges, and cave entrances. It is a nocturnal species that emerges at dusk to feed on zooplankton and retreats to sheltered spots during daylight hours. In the aquarium, it adapts well to regular feeding schedules and becomes increasingly active during the day as it grows comfortable with its surroundings.
As a paternal mouthbrooder, the Red Belted Cardinalfish exhibits one of the most fascinating reproductive strategies in the marine world. Males carry the fertilized eggs in their mouths for the duration of development, abstaining from food throughout the incubation period. This dedicated parental care makes the species particularly interesting to observe and provides opportunities for captive breeding by dedicated aquarists.
Red Belted Cardinalfish are carnivores that feed primarily on zooplankton and small crustaceans in the wild. In captivity, they accept frozen mysis shrimp, enriched brine shrimp, cyclops, chopped seafood, and quality marine pellets. Feed two to three times daily with appropriately sized portions.
The Red Belted Cardinalfish is peaceful and compatible with most reef community fish. It does well with clownfish, gobies, blennies, dartfish, and other cardinalfish species. Avoid housing with large or aggressive fish that may intimidate or outcompete it. Groups typically coexist well with minimal intraspecific aggression.
Check CompatibilityRed Belted Cardinalfish are paternal mouthbrooders. Males incubate fertilized eggs in their mouths for approximately 7-10 days, abstaining from food during this period. Pairs form within established groups. Fry require small live foods such as rotifers and newly hatched brine shrimp initially.