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Fire corals are colonial marine cnidarians that when touched can cause burning skin reactions. Fire-coral-related incidents are common among divers with poor buoyancy control. Biology and Identification Fire coral, which belong to the genus Millepora, are found in tropical and subtropical waters around the world. Generally fire coral adopts a yellow-green or brownish branchy formation, […]

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The lionfish is a genus of venomous fish commonly found in tropical reefs. Native to the Indo-Pacific, the fish is one of the most infamous invasive species in the western Atlantic. This voracious predator is not a threat to divers, but its introduction into exotic ecosystems can decimate juvenile specimens. In an attempt to control […]

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Sea urchins are typically small, rounded, spiny creatures found on shallow rocky marine coastlines. The primary hazard associated with sea urchins is contact with their spines. Biology and Identification Sea urchins are echinoderms, a phylum of marine animals shared with starfish, sand dollars and sea cucumbers. Echinoderms are recognizable because of their pentaradial symmetry (they […]

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