Sea Urchins

An overfishing of herring can disrupt the food chain and remove a key predator of sea urchins. With fewer herring to feed on sea urchins, their populations can increase unchecked leading to ecosystem imbalance and potentially to overgrazing on kelp forests where sea urchins feed.

Im up it the part where i need the sea urchins for tobors scrool . and ive been looking every where and I think you can get them by fishing in either rocket reef or the nature perserve. if not just wait till you get to the other islaands!

That depends, obviously, on the species of Sea Urchin. All belong to the Phylum Echinodermata (along with sea stars and sea cucumbers) and to the Class Echinoidea. They are then divided into different orders, genera and species. That depends, obviously, on the species of Sea Urchin. All belong to the Phylum Echinodermata (along with sea stars and sea cucumbers) and to the Class Echinoidea. They are then divided into different orders, genera and species.

It is difficult to estimate the exact number of sea urchins in the world due to various species and different habitats they occupy. However, sea urchin populations can vary greatly depending on factors such as environmental conditions and food availability.

Sea urchins reproduce sexually, with separate male and female individuals releasing eggs and sperm into the water for fertilization to occur externally. They can also reproduce asexually through a process called fragmentation, where a piece of the sea urchin's body can regenerate into a new individual.

Sea urchins are purple, red, orange, yellow/orange, and a mix of red and purple.(Sea Urchins come in many shapes sizes and colors.)

While sea urchins are slow and non-aggressive, they do have spines for a reason. Some sea urchins possess venomous spines, sharp enough to pierce through a diving suit. This venom can cause muscle spasms, faintness, difficulty breathing and death.

The pea crab is a scavenger, a food source and an indicator of the health of the ocean. As the scavenger, eating what washes on shore, they have been known to imposex, change genitalia, based on the pollutants found in the ocean. They are also an important food source for fish, birds and other crabs.

Sea urchins have a hard shell called a test that protects their soft inner body. They also possess tube feet that help them move and cling to surfaces. Sea urchins are able to feed on algae and organic matter using a specialized feeding structure called Aristotle’s lantern.

Echinoderms.

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.

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.

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.

sea urchins weigh about 2300 pounds, just like your mama!

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."

sea urchins eat eaten by crabs, sunflower stars, snails, sea otters some birds, some fish and people...

the three germ layers on a squid are the ectoderm, endoderm and mesoderm

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.