Location is worldwide (excluding Hawaii) in reefs & shallow waters.
White to yellow-green appearance that are fixed to rocks and<unk> .
They possess tentacles that extend upward & are roughly 2m in length.<unk><unk> s (Millepora) are a genus of colonial marine organisms that exhibit physical characteristics similar to that of<unk> . The name<unk>  is somewhat misleading, as<unk><unk> s are not true<unk> s but are instead more closely related to Hydra and other hydrozoans, making them hydrocorals.
Physical contact or osmotic gradient  causes discharge of nematocysts
A spring loaded venom delivery system
Once opened, a nematocyst releases all of its contained venom
Fire coral envenomation
Toxins
Crown-of-Thorns starfish envenomation
Ciguatera
Stonefish envenomation
Scombroid
Box jellyfish envenomation
Tetrodotoxin 