Where am I on the reef?

Coral reefs are highly diverse over scales as small as inches to as large as miles. To better compare between observations, we ask you to report where on the reef your observations took place. Reefs are divided into several distinct areas:

Lagoon: Calm, sheltered side of the reef
Reef Crest: Shallowest portion of the reef, generally exposed at low tide
Back Reef: Margin of the reef crest facing the lagoon
Fore Reef: Seaward margin of the reef crest, typically where waves break
Deep Fore Reef: Edge of the fore reef (~20 m depth) with steep slope and high coral abundance