These flattened crustaceans are not true lobsters, but they are masters of disguise.

Nature · Published 3 October 2026 Swipe more like this →

In short: Slipper lobsters are easily identified by their wide, plate-like antennae, but they lack the giant neurons required for a quick escape. Instead of darting away, these bottom-dwelling creatures rely on a heavily armored exoskeleton and the ability to bury themselves in the substrate to survive encounters with hungry predators.

Belonging to the family Scyllaridae, slipper lobsters are achelate crustaceans found in warm oceans worldwide. Despite their name, they are not true lobsters; they are more closely related to spiny and furry lobsters. Their most striking feature is a pair of second antennae, which have evolved into flattened, horizontal plates projecting from the head. These animals inhabit continental shelves at depths reaching 500 metres, where they feed on a diverse diet of molluscs, crustaceans, and echinoderms.

The family exhibits significant size variation. The smallest species, Scyllarus pygmaeus, rarely exceeds 40 millimetres in length, while the largest, Scyllarides haanii, can grow up to 50 centimetres. Their life cycle is equally distinct: after hatching, they spend nearly a year as leaf-like, planktonic larvae known as phyllosoma. Following a brief 'nisto' stage, they transition into adulthood, though the specifics of this transformation remain largely a mystery to researchers.

Evolutionarily, the fossil record for slipper lobsters dates back 100 to 120 million years. While they are fished commercially—with annual production recently reaching about 5,000 tonnes—they have not faced the same intensity of exploitation as their spiny or true lobster cousins. Because they lack the rapid tail-flip reflex found in other decapod crustaceans, they are uniquely vulnerable to bony fish, such as the grey triggerfish, which serves as a primary predator for Mediterranean species.

Their common names are as varied as their habitats. In Australia, they are frequently called 'bugs' like the Moreton Bay bug, while in Greece, they are known as 'bum hitters'. With 22 recognized genera, these creatures remain a fascinating, if often overlooked, component of marine ecosystems, thriving through slow growth and a reliance on their robust, armored defenses rather than speed.

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