II. Background

  1. Not a true coral
  2. Categorized as calcareous hydrozoan
  3. Small brush-like growth on rocks and coral

III. Symptoms

  1. Initial: Stinging or burning pain
  2. Later: Severe itching and Urticaria

IV. Course

  1. Pain resolves in 90 minutes (earlier if treated)
  2. Urticaria flatten in 24 hours and resolve in 7 days
    1. May be hyperpigmented for up to 2 months

V. Management

  1. Treat the same as Jellyfish stings

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