Three main rocky reef classes have been identified in the SeaMap Tasmania habitat classifications. These classes include high profile reef, medium profile reef and low profile reef. An additional category defined as patchy reef is baed on the spatial structuring that results in distinct patches of reef between areas of unconsolidated substrate.
High profile reef is used to characterise the consolidated seabed when the vertical profile changes by up to 4 m across a linear distance of 10 m. It is usually coincident with steep underwater cliffs, large boulder fields or areas of very high rugosity.
Medium profile reef characterises vertical changes in profile of the consolidated seabed from 1 -4m.
Low profile reef is used to characterise the consolidated seabed where there is very little change in relif (< 1m).