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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
Sea urchins reproduce by releasing eggs and sperm into the water, where external fertilization takes place. Once fertilized, the eggs develop into larvae that eventually settle and grow into adult sea urchins. Some species of sea urchins can also reproduce by asexual means, such as splitting or budding.
It depends on the species of urchin, they can live anywhere from 4 to 150 years.
Sea urchins reproduce by releasing eggs and sperm into the water, where fertilization occurs externally. Once fertilized, the eggs develop into larvae and eventually settle onto the ocean floor to grow into adult sea urchins. The larval stage allows for dispersion and colonization of new areas.
What do purple sea urchins eat?
The Purple Sea Urchin's diet consists of plants, animal matter, including algae, dead fish, sponges, decaying matter, mussels, barnacles, and kelp.
The Purple Sea Urchin is the prey of crabs, sunflowers stars, snails, most birds, fish, sea otters, and humans. The Purple Sea Urchin is actually a delicacy in some countries.
Sea urchins are found in oceans all around the world, typically in shallow waters along rocky shores. They can also be found in coral reefs and seagrass beds. Some species of sea urchins can live in depths of up to 16,000 feet (4,800 meters).
No - sea urchins are part of the echinoderm phylum, with sand dollars, starfish and sea cucumbers.
Can you hold a sea urchin bare hand?
Yes some species are safe to hold, I held one on my recent Caribbean cruise. However other species are not safe to touch. If you dont know the best bet is not to touch it as they can be venomous.
How many Sea Urchins are there left in the world?
I would say there aren't many living, wild, seahorses left in the world's oceans, as many species are endangered. Here is an exerpt from WildInvest from a few years ago:
"Many seahorse species were added to the World Conservation Union's Red List of Threatened Animals in 1996. Both heavy exploitation and habitat degradation are contributing to declines of up to 15-70% in many seahorse populations over periods of 5-10 years. At least twenty million seahorses are traded each year - the majority used as traditional medicines. The aquarium trade also deals in live seahorses, despite the fact that they are difficult to keep in an aquarium. In this way, a vicious circle is created: aquarium owners often replace the dead ones, thereby contributing to their continuing decline. Seahorses are also traded as tacky souvenirs, incorporated in shell craft, yo-yos and other curios
Seahorses are found in nearshore habitats that are among the most threatened in the world. Degradation and destruction of these coastal eccosystems due to mangrove cutting, coral mining, dynamite fishing, trawling, land-derived pollution and a host of other human activities negatively affect these threatened species.
Seahorses are caught as target catch and trawl by-catch in the coastal waters of Vietnam. In recent years, there has been concern that the number of seahorses is decreasing. However, prior to the establishment of Project Seahorse - Vietnam, no fisheries data were available for seahorses."
What does a sea urchin get eaten by?
sea urchins eat eaten by crabs, sunflower stars, snails, sea otters some birds, some fish and people...
What are the three types of germ layers that form tissues and organs in sea urchins?
the three germ layers on a squid are the ectoderm, endoderm and mesoderm
What is a group of sea urchins called?
A young sea urchin is called larva, pluteus (free-swimming stage), or juvenile.
Anemones, also known as windflowers, are a diverse group, with various species blooming in spring and fall. Anemones display variation in their daily activity patterns, but it is not clear whether all of them sleep.
Yes. Classes of mollusks which include clams, oysters, and other bivalves are sessile filter feeders.
Is sea urchin bioluminescent creature?
yes an angler fis is a bioluminescent animal this is because all jelly fish are biolumenscent animals...........................................................................yes an angler fis is a bioluminescent animal this is because all jelly fish are biolumenscent animals...........................................................................
Is the sea urchin in the lower intertidal zone?
The zone sea urchins live in is nothing. They don't live in the ocean. Sea urchins live high up in trees. Their diet consists of elifunts and tiygurs. They are eetun by ants and spiydurs. Also sea urchins can fly. And they have x-ray vishun and freez breth. They also have jiunt manshuns and like to punch thing with thayr soopur strong fists. Also they are imurtel which means they can't die... evur. These are truly fasinateng kreechirs.
When do sea urchins communicate?
they do not make sounds or noises but they send out chemicals and they only communicate when they are mating
Do sea urchins have an open circulatory system?
All vertebrate animals (animals with spines) and a few invertebrates
("echinoderms" - starfish, sand dollars, sea urchins, and sea
cucumbers) have closed circulatory systems.
What two ways spines are useful adaptation for sea urchins?
