Reading a reef

What to look at on your next dive, what each sign actually means, and how to record it so it counts.

Free PDF, 7 pages. No email needed.

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Cover of Reading a reef
Most reefs are surveyed rarely, or never. Divers are in the water at exactly those sites, several times a week, already looking closely. The gap was never willingness, it was knowing what to look at.

What is inside

  1. Why divers see reefs that nobody surveys
  2. Four signs of a healthy reef
  3. What a reef in trouble looks like
  4. Indicator species: nudibranchs, urchins and invasives
  5. How to record what you see so it actually counts

Every dive you log becomes marine data

DIVR is a free dive log with community science built in. Log a dive in under 30 seconds, tag species checked against the World Register of Marine Species, and rate coral health on the same five-step scale reef surveys use.