Common name: Urchin cardinalfish

General information

The Piping Cardinalfish, scientifically known as Siphamia tubifer, is a small and intriguing species popular among aquarists for its unique behaviors and ease of care. This species is known for its nocturnal habits and its distinctive, trumpet-like sound, which is produced by the muscles within its swim bladder. The sound serves as a means of communication among individuals, particularly during mating rituals.

Care

Siphamia tubifer is a hardy species that adapts well to life in captivity. They prefer a well-structured aquarium with plenty of hiding places, as they are naturally shy and reclusive. Dim lighting or a nocturnal lighting schedule can help mimic their natural environment and encourage natural behaviors. A varied diet of small meaty foods, such as brine shrimp and mysis, will keep them healthy and active.

Reproduction

In the wild, Siphamia tubifer engages in mouthbrooding, where the male carries the fertilized eggs in his mouth until they hatch. This fascinating reproductive strategy can also be observed in the home aquarium if the environment is stable and the fish are well-fed and stress-free.

Symbiosis

One of the most remarkable aspects of Siphamia tubifer is its symbiotic relationship with certain species of sea urchins, particularly those in the genus Diadema. The cardinalfish uses the spines of the sea urchin for protection against predators, darting among them when threatened. This relationship is a classic example of commensalism, where the cardinalfish benefits from the association without harming the sea urchin.

Habitat

Siphamia tubifer is found in the Indo-Pacific region, from the Red Sea and East Africa to the western Pacific. They inhabit shallow reef environments, often associating with sea urchins in the genus Diadema. These cardinalfish are typically found at depths where light is subdued, which supports their nocturnal lifestyle.