<aside> 🔎 Visualize: Continue refinement of research through information, data, and visualizations. Investigation: how does each energy source operate structurally, socially, internally, and in relation to other systems and organisms?
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They have bony, calcified skin, which protects them from most predators, and many wear striking colors that camouflage them or scare off potential attackers. Purely marine animals, there are no freshwater sea stars, and only a few live in brackish water.
Beyond their distinctive shape, sea stars are famous for their ability to regenerate limbs, and in some cases, entire bodies. They accomplish this by housing most or all of their vital organs in their arms. Some require the central body to be intact to regenerate, but a few species can grow an entirely new sea star just from a portion of a severed limb. Structurally
Most sea stars also have the remarkable ability to consume prey outside their bodies. Using tiny, suction-cupped tube feet, they pry open clams or oysters, and their sack-like cardiac stomach emerges from their mouth and oozes inside the shell. The stomach then envelops the prey to digest it, and finally withdraws back into the body.
Starfish have developed special digestive systems adapted to the food sources found in their particular environment. They have dual stomachs, called the cardiac stomach and the pyloric stomach. The cardiac stomach is a sacklike organ located at the center of their bodies. The stomach is externalized through their mouths to envelop and digest their prey. They inject it into bivalve mollusks and suck out the soft internal body parts. Digestion is then completed in the pyloric stomach. This adaptation allows starfish to eat animals much larger than their mouths.
Tube Feet pray open any gap in the hydrolic shells
then the sea star deploy the stamoch inside the victum and digest them alive In relationship
Seastars has special protein allows them to lock their arms in a position for hours. The miniscule muscles that woven them together can flex the arms in any direction.