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Siganus rivulatus and Siganus luridus
The Rabbitfish possesses venomous spines located in its dorsal, pelvic, and anal fins. While a sting is not lethal to humans, it causes immediate swelling and excruciatingly intense pain. Extreme caution is required when handling this fish, especially when removing it from a hook or net.
The Rabbitfish is one of the most well-known Lessepsian migrants that entered the Mediterranean from the Red Sea via the Suez Canal. The body is oval and laterally compressed, while its small mouth resembles that of a rabbit, which accounts for its international name. In the Mediterranean, two distinct species are identified:
Marbled Rabbitfish (Siganus rivulatus): This species has a silver to light olive colour and is distinguished by faint, thin yellow lines running along its sides. Its tail is noticeably forked.
Dusky Rabbitfish (Siganus luridus): This species is darker, usually appearing brown or dark olive, with irregular spots that help it camouflage against rocks. Its tail is straight and appears as if it has been cut square.
This fish lives and feeds on the seabed, typically in shallow waters ranging from 1 to 30 metres. Its presence depends heavily on the type of substrate. The Marbled variety prefers seagrass meadows and sandy areas near vegetation. Conversely, the Dusky variety is found almost exclusively on rocky seabeds and stones where it can find crevices for shelter.
Spawning takes place during the summer, primarily in July and August when water temperatures are high. During this season, the Marbled variety forms massive breeding schools, whereas the Dusky variety often remains more solitary or gathers in small, limited groups.
This is a very popular target for coastal anglers. It is easily caught using a rod and float, with dough, bread, or a specific type of marine weed used as bait. It holds significant commercial value, particularly in Cyprus and the Dodecanese islands, where it is considered an exquisite delicacy when fried.
The venom found in the spines is heat-labile. If you are stung, immediately submerge the affected area in very hot water (approximately 45°C - 50°C) for 30 to 90 minutes. This is the only effective method to deactivate the protein and stop the intense pain.