Palytoxin Safety: What Every Reefer Needs to Know

Important Safety Information

This isn't a fun topic, but it's essential. Anyone keeping zoanthids or palythoa needs to understand palytoxin — not to be frightened off the hobby, but to handle these corals safely.

What Is Palytoxin?

Palytoxin is one of the most potent biological toxins known, produced by certain Palythoa species (and potentially some zoanthids). Not all palythoa produce it and concentrations vary, but all palys and zoas should be treated as potentially toxic.

Symptoms of exposure include severe flu-like symptoms, eye inflammation, skin irritation, and in extreme cases, hospitalisation.

How Exposure Happens

Handling with cuts or broken skin — toxin enters through open wounds
Spraying during fragging — disturbed palys release toxin-laden mucus
Boiling live rock — aerosolises the toxin. There are multiple cases of families hospitalised from this. Never boil live rock
Touching the face after handling without washing hands

Safety Precautions

Routine maintenance: Wear nitrile gloves, don't touch your face, cover any cuts.

Fragging:

Gloves — always
Eye protection — the most important and most skipped precaution. Palytoxin in the eye is a medical emergency
Work in a well-ventilated area
Frag underwater in a container to reduce spray
Never use power tools on palythoa — they maximise spray
Wash hands thoroughly afterwards

Rock cleaning: Never boil, bake, or microwave live rock with potential palythoa. Use a bleach solution (1:10) in a ventilated area.

If Exposed

Eyes: Flush with clean water for 15+ minutes, then go to A&E. Mention "palytoxin ophthalmia"
Skin with symptoms: Wash thoroughly. If muscle pain, chest tightness, or breathing difficulty develops — call 999
Inhalation: Get to fresh air. A&E if breathing difficulty develops

Keeping It In Perspective

Millions of people keep palythoa and zoanthids without issues. The toxin is concentrated in coral tissue and mucus, not constantly leaching into tank water. Basic hygiene — gloves, hand washing, eye protection when fragging — is all it takes.

Basic rules: Gloves for tank work. Gloves and goggles for fragging. Never boil live rock. Wash hands after any tank work. Make sure everyone in the household knows the basics.