Frequently Asked Questions
The most-asked questions about Pharaoh cardinalfish.
What is a Pharaoh cardinalfish?
It is a small, brightly colored reef fish (Pterapogon kauderni) native to the Indo-Pacific, widely kept in saltwater aquariums for its bold orange body and distinctive black facial mask.
Where do Pharaoh cardinalfish live in the wild?
They inhabit shallow coral reefs, lagoons, and outer reef slopes across the Indian and Pacific Oceans, typically at depths of one to thirty meters.
How big does a Pharaoh cardinalfish grow?
Adults reach roughly five to six centimeters (about two inches) in total length, making them a compact choice for community tanks.
What do they look like?
They display a vivid orange-to-red body, a broad black band covering the eyes and gill area, and a thin white stripe running from the snout through the eye.
What do they eat?
In the wild they graze on tiny invertebrates, plankton, and organic detritus; in captivity they readily accept flakes, pellets, and frozen brine shrimp.
Are they good for beginners in saltwater keeping?
Yes—they are hardy, peaceful, and forgiving of minor water-quality fluctuations, which makes them one of the most recommended starter reef fish.
Do they school or pair?
They are most commonly kept as a bonded pair, though small groups can work in sufficiently large tanks; males and females are distinguishable by the male's slightly more pointed dorsal fin.
How long do they live?
With proper care in a well-maintained aquarium, a Pharaoh cardinalfish can live approximately five to ten years.
Why is it called "Pharaoh"?
The common name refers to the fish's striking black mask and white stripe, which together resemble the ornamental headgear associated with ancient Egyptian pharaohs.
What sets them apart from other cardinalfish?
Compared to the similar three-banded cardinalfish (Pterapogon tricolor), the Pharaoh has only a single broad black band rather than multiple vertical bars, and it tends to be a bit more robust and active in the tank.