Stinging hydroid: Aglanophenia spp.; polyp colonies of feathery, tree-like ferns growing on rocks and dead coral. Local inflammatory reactions on skin contact best managed with topical antihistamines and corticosteroids. Sea nettle: Chrysaora quinquecirrha; pink jellyfish with complex venom of esterases, proteases, hyaluronidase. Severe pain, then blistering tentacle tracks may be followed by skip areas of skin necrosis. Topical baking soda paste can inactivate venom.
Mauve stinger: Pelagia noctiluca yellow-to-luminescent pink jellyfish; contact causes initial blisters that heal slowly with hyperpigmenta-tion. Systemic toxicity with weakness, headache, nausea, vomiting possible. Topical-like anesthetics more effective for pain than topical antihistamines and corticosteroids.
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