Starfish are benthic predators. Since they usually eat shellfish like mussels or scallops, they would be second order consumers.
it's impact on it's environment
well i have to say a blue whales niche is to eat krill and keep them in watch
Starfish and blue crabs are both inverts. They are known to clean the ocean and are egg layers, depending on the starfish depends if they are sand sifters as well.
blue
its that blue green algae niche is providing food for animals
valvatida
Niche: They consume small invertebrates and are consumed by larger animals.
It eats fish
It is a bottom feeder....
Keystone species of the Chesapeake Bay food web.
A light orange
it is blue grey colered