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Sea Urchins
There are over 900 sea urchin species and they can be found in almost all parts of any ocean. They are often characterized by protruding spines from their test.
260 Questions
Do sea urchins live in warm water?
No, atually they live in massive groups, searching for kelp and other sea grasses to munch on. A large mass of urchins can clear massive kelp forests in a short amount of time. Most urchin groups live in shallows, but some species prefer deeper waters.
Sea Urchins spawn, much like fish, directly into the sea. First the male with release his sperm into the water and then the female will release her eggs. This type of mating is very common among water dwelling animals.
because its their food, they usually eat shellfish and fish
There is not an exact colour but, black, red, purple, and green are some of the most common colours you will see on a sea urchins.
Is a sea urchin a bottom feeder?
Yes, sea urchins are considered bottom feeders. They primarily graze on algae and detritus found on the ocean floor, using their specialized mouthparts to scrape food from rocks and other surfaces. Their feeding behavior plays a vital role in maintaining the health of marine ecosystems by controlling algae growth.
What is the genus species name of a sea urchin?
Based on: http://en.wikipedia.org/wiki/Sea_urchin
... Sea Urchins are small, spiny sea creatures of the class Echinoidea found in oceans all over the world. ...
... Sea urchins are members of the phylum Echinodermata, which also includes starfish, sea cucumbers, brittle stars, and crinoids. Like other echinoderms they have fivefold symmetry (called pentamerism) and move by means of hundreds of tiny, transparent, adhesive "tube feet". ...
... Within the echinoderms, sea urchins are classified as echinoids (class Echinoidea). Specifically, the term "sea urchin" refers to the "regular echinoids," which are symmetrical and globular. The ordinary phrase "sea urchin" actually includes several different taxonomic groups: the Echinoida and the Cidaroida or "slate-pencil urchins", which have very thick, blunt spines (see image at right), and others (see taxonomic box on the right). Besides sea urchins, the Echinoidea also includes three groups of "irregular" echinoids: flattened sand dollars, sea biscuits, and heart urchins. ...
hope it helps!
Are there any sea urchins that are poisonous to eat?
i have tried one. when it's in sushi it's called uni.
The gonads of the purple sea urchins of the eastern pacific rim, Strongylocentrotus purpuratus, are quite edible and very tasty. The only problem is, they're a lot smaller than S. fransiscanus, the black sea urchin (the one you usually see in sushi bars). Smaller means lower yield and harder to prepare or eat. But yes -- you can eat them.
Do sea urchins have an endoskeleton?
No. echinoderms have no exoskeleton.
Related Information:
Echinoderms are deuterostomes, a group belonging to the Phylum, Chordata but separate from the vertebrates, also of this phylum. While there is a close relationship between the echinoderms and the vertebrates, echinoderms are endoskeletal invertebrates.
What are some different types of sea urchins?
There are over 700 species of Sea urchins. Some examples would be the pincushion sea urchin, the popular and common longspine urchin, the Blue Tuxedo urchin, the shortspine urchin and the pencil urchin. They usually differ in color, location most common and overall look or how long their spines are.
What can help the sea urchins To survive?
Sea urchins get their food at the bottom of the sea floor to eat dead fish.
Sea urchins move using their tube feet and spines on the underside of their body. they use their water vascular system. THis is where they pump water into their feet and when they touch the ground the water gets pushed out. This uses a lot of energy but only works slowly.
What color is a purple sea urchins spines?
The spiky spines of purple sea urchins range in colours depending on the exact species and the maturity of the urchin.
They can range from light blue, dark blue, royal blue, indigo, light purple, violet and dark purple.
Are there sea urchins in Fiji?
No. There are whales,dolphines,sharks,fishes of varieties,starfish,turtles,jellyfish etc in Fiji but no seals.
What is sticky on a starfish and sea urchins?
They release a gluey substance from their mouths, almost like saliva.
Starfish or sea stars are able to turn their stomachs inside out, the extended stomach hangs outside and engulfs food, partially digesting it. Thus it can feed on food larger than its mouth could handle.
Eventually, it and the food it is working on, is sucked or pulled back inside their body. The partially digested food then is passed along to a second stomach that completes the digestive process. They can also use their tube feet to open shells of calms and etc........
they also have a disaese called listen to yo teacher better OK.
The mouth and stomach of the starfish face towards the surface it's resting on. When the starfish finds a prey, it actually pushes its stomach outside of its mouth and the stomach eats the prey whole. Then it swallows its stomach.
Starfishes open there stomach inside out to suck in there predators and eat them.
their stomach which they turn inside out over their food
Starfish eat mollusks. When they find their dinner, they use their arms to break open the shell. After that, they extrude their stomachs out of their body and swallow the shellfish whole.
Starfish eat their food by turning there stomachs inside out and leaving the food there until digested.
