Aquatic – (animal) living in water
Ecosystem – a biological community of interacting organisms and their physical environment
Invertebrate - an animal lacking a backbone
Fish - a limbless cold-blooded vertebrate animal with gills and fins, living wholly in water.
Mangrove - a tree or shrub that grows in chiefly tropical coastal swamps that are flooded at high tide.
Artificial - made or produced by human beings rather than occurring naturally