Corals, oysters and calcareous polychaete worms for
reefs
Marine angiosperm grasses (turtle grass) and large
brown macroalgae (kelp) modify current flows, plus act
as nursery and refuge habitats
Bivalve mollusks fertilize sediments with feces,
contributing to benthic plany growth
Various excavating organisms (fish, crustaceans and
worms)
Green turtles and manatees ‘plow’ angiosperm grass
fields