they are generally characterized by their long

Some sea cucumbers have feathery tentacles flowing from their mouths,some are puffed like bloated balloons,and others simply look like Headless Chicken Monsters the actual name given to a rare deep-sea species.But they are generally characterized by their long, cylindrical shape.A sea cucumber is essentially a brainless,fleshy form surrounding a digestive tract,bookended by a mouth and an anus.