Marine biome animals are; fish like shark; fissipeds like sea otter and polar bear; cetaceans like dolphin, whale; sirenians like manatee; and pinnipeds like sea lion.
Marine food chain is a linear, hierarchical model of food consumption and energy transfer in marine ecosystems. Marine food web is a network of marine food chains.
Marine ecosystems are saltwater bodies defined by distinctive physicochemical properties, biological organisms and processes. Marine ecosystems definition
Aquatic ecosystem is a hydrological system or environment that comprises of water, aquatic organisms and hydrological processes. Aquatic ecosystem definition