The echinoderms are a group of animals that includes starfish, urchins, feather stars, and sea cucumbers. They are simple animals, lacking a brain and complex sensing organs.
They have pentaradial symmetry and a calcareous endoskeleton that may possess pigment cells that give them a wide range of colors, as well as cells that possess toxins.
- Brittle Star
- Sea Urchin
- Sand Dollar
- Sea Cucumber
- Ophiura Ophiura (Serpent Star)
- Sea Lily (Feather Star)
- He could still remember it, a picture of a house and a tree and a sun with rays like a starfish.
- The sponge brittle star lives within or near sponges and soft corals in the ocean.
- An orthodontist’s dream, an Atlantic wolffish displays the hardware it uses to crush mollusks, shellfish, and sea urchins.
- She pulled out a perfect sand dollar she found on a California beach.
- If you pick up a sea cucumber, do so with care, for they have an extravagant way of defending themselves.
- Crinoids are brought up in trawls from the deep sea several thousand at a time.
- Ophiura ophiura or the serpent star is a species of a brittle star in the order Ophiurida.
- The sea lily is an order of marine animals referred to as crinoids.
- Feather stars are unstalked crinoids that live in both shallow water and the depths of the ocean.
- Starfish contains different types of bioactive materials, such as proteins, enzymes, steroidal glycosides, gangliosides, alkaloids, etc.
- Results show that the sea cucumber polysaccharide contains SO42-, and is a kind of mucositis sulfate.
- A sea urchin is nestled in a coral formation off Bonaire Island.