Two reefs close to the coastal environment, the coastal reef "Gallega" and the platform reef
"Galleguilla" located in North VRSNP.
Givetian to Famennian (Middle and Late Devonian) platform reef
complexes extend over 350 km along the northern margin of the onshore Canning Basin, adjoining Precambrian rocks of the King Leopold Orogen and Kimberley Basin to the north (Playford, 1984).
This platform reef
is closed off from the surrounding ocean for 3-5 hours during each low tide (Ludington, 1979).
Both are platform reefs
, consisting of a shallow lagoon surrounded by a continuous rim of coral comprising distinctive reef flat, crest, and slope habitats.
Ocean platform reefs
: Sampling was conducted west of San Andres and Providencia, at coordinates 12[degrees]30'01" N-81[degrees]45'56" W and 13[degrees]23'54.6" N-81[degrees]23'57" W, respectively.
In the Atlantic Ocean, ripe balao females were collected above platform reefs
in 58.0% of sets, above seagrass beds in 25.8% of sets, over bare substrate in 9.7% of sets, and above undefined hard bottom in 6.5% of sets.