Squeaker

Fascinating facts about the Squeaker

• Synodontis multipunctatus grows to a length of 27.5 cm (10.8 in) and gathers in large schools at depths of about 40 m (130 ft) in Lake Tanganyika.
• When a mouthbrooding cichlid like Ctenochromis horei releases a cloud of eggs, the catfish is attracted by the smell and releases its own eggs into the mass before the cichlid finishes collecting them, so the host ends up caring for both.
• The catfish’s embryos hatch inside the cichlid’s mouth and use their well-developed teeth to eat the host’s eggs and embryos.
• In home aquariums the species only reaches about 15 cm (5.9 in), yet it can become fiercely territorial, especially toward other upside-down catfish. Keeping groups of more than three individuals spreads out aggression, showing how social numbers can calm a naturally combative fish.
• Despite being a minor part of local fisheries, the catfish’s brood-parasitic strategy has made it a favorite in cichlid tanks, where hobbyists can reproduce it by providing suitable host species from Lakes Malawi, Victoria, or Tanganyika. Its success in captivity highlights how a wild trick can become a useful tool for aquarium breeding.

At a glance

About the Squeaker

Synodontis multipunctatus, the cuckoo catfish or squeaker, is a sleek, upside-down swimmer that glides through the dim depths of Lake Tanganyika, a Great Rift Valley lake famed for its cichlids. Reaching up to 27.5 cm (10.8 in) in total length, it forms massive schools around 40 m (130 ft) below the surface, where its generalist diet includes a variety of small organisms. Its most astonishing trait is its reproductive strategy: like the cuckoo bird, it deposits large, cichlid-mimicking eggs among the spawning masses of mouthbrooding cichlids such as Ctenochromis horei and Simochromis babaulti. The unsuspecting female scoops up the catfish eggs along with her own, only for the hatchlings to emerge inside her mouth, armed with well-developed teeth that devour the host’s embryos. This brood-parasitic tactic frees the catfish from parental duties, allowing rapid, frequent spawning. In captivity, the squeaker grows to about 15 cm (5.9 in) and thrives when kept in groups larger than three, displaying bold, territorial behavior and a surprising diurnal activity pattern that makes it a lively addition to cichlid-focused aquariums. Its presence in the aquarium trade reflects its adaptability, yet it remains a modest component of local fisheries, quietly inhabiting the ancient waters of Tanganyika.

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