Sad Klipfish

Fascinating facts about the Sad Klipfish

• At just 13 cm long, this coastal fish fits in the palm of your hand yet still sports a full set of 30–34 dorsal spines.
• When the breeding season arrives, between 36% and 53% of females become pregnant, a viviparous trait that lets the young develop inside the mother.
• Its range stretches from the subtidal waters west of Algoa Bay all the way to Lüderitzbucht, but you’ll find it most often perched under rocks on the Cape Peninsula’s littoral.
• A diet of tiny crustaceans, amphipods, isopods and crabs, means it can survive in the cramped, nutrient-rich pools that splash onto the shoreline at low tide.
• Unlike its look-alike cousin Clinus heterodon, this fish shows a larger head, a lower dorsal fin profile, and unmistakable dark bands radiating from its eyes, giving it a permanently “sad” expression.

At a glance

About the Sad Klipfish

The sad klipfish, Clinus acuminatus, is a modestly sized member of the Clinidae, reaching about 13 cm in total length. Its slightly compressed body ends in a wedge-shaped snout, while a pair of prominent supra-orbital tentacles, short, flattened stalks capped with simple branches, frame its eyes. The fish’s dorsal fin is low and even, the first spine the shortest of the series, and its coloration shifts from pale buff to light green, yellowish-brown or grey, speckled with tiny white spots and accented by darker mosaic-like bars. Vermilion tips on the fins and tentacles, a dark shoulder spot, and radiating dark bands from the eye give it a perpetually “sad” expression, a trait that distinguishes it from its close relative Clinus heterodon, which lacks the mosaic bars and has a smaller head. Juveniles are stark white with bold black cross-bars, a dramatic contrast to the adult’s muted palette. Endemic to the rocky shores of southern Africa, the sad klipfish inhabits intertidal rock pools and the undersides of ledges from west of Algoa Bay to Lüderitzbucht, thriving especially west of Cape Point and the Cape Peninsula. Viviparous and opportunistic, it preys on small crustaceans, amphipods, isopods, and crabs, while females show a striking 36-53 % sexual frequency. Its ability to give birth to live young in the turbulent, shallow pools is a surprising adaptation that ensures the next generation is ready for the harsh, ever-changing tide environment, pulling the observer deeper into the hidden drama of these coastal micro-ecosystems…

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