The mouth of a starfish is located on the underside of the body. They hunt for prey and eat them in a curious way. Please refer to the suggested link for more detailed information on the digestive system of sea stars.
sea star
Photosynthesis!
They hunt for their food.
The food obtain from sea ie: fish, prawns, cuttle fish, crab etc
Lancelets and amphibians have less yolk because they have swimming larvae which can obtain their own food. Reptiles and birds are terrestrial species with eggshells to prevent desiccation, so they are unable to obtain their own food.
a sea star catches food, by going up to its prey, using its suction cups to open the food up, and the sea star then pushes its stomach out of its mouth, and on to the food and chemicals from the sea stars mouth then kill the food, and the sea star rips the food from its shell, and digests it
actually that's a very good question who ever aks this,and the function of the arm of a sea star is just to help the sea star to get food and it hepls to they can walk inside of the ocean
After a sea star digests its food, the nutrients are absorbed into its body through the walls of its stomach and digestive glands. The remaining waste is expelled through the same opening it used to consume the food, as sea stars do not have a separate anus. This process allows the sea star to efficiently utilize the nutrients from its prey while disposing of indigestible parts.
A echinoderm can obtain resources because if you think about it, The sea urchin etc. they all filter feed that is how they get their food.
=A sea star really does not eat anything. If there is moss or algae on the item the sea star is clinging to, it will suck those up.=
Sea stars eat their food with their mouths. Their mouths are located in the center part under their body. Their mouths are tiny.
Because of their method of digesting food externally, there is not much food that gets undigested within a sea star. Wastes from digestion are excreted through the anus on top of the sea star or through the water vascular system.