Starfish

Sea stars (also called starfish) live in marine habitats where they move across the ocean floor on what are called tube feet. Some sea stars are carnivores while others are omnivores. In either case, most sea stars have what is called a cardiac stomach. They are able to bring their stomach out of their body and engulf their prey before consuming it. Sea stars can produce either sexually, where it takes a male and a female to create young, or asexually, where a single individual can produce both sperm and egg. Reproduction takes place through spawning; essentially a female will release unfertilized eggs and a male will release sperm to fertilize those eggs. Certain species of starfish have the ability to regenerate a lost arm. This is helpful because if a predator tears off one of the arms of the starfish, it is not a death sentence for the animal.

Some jellyfish prefer the cold waters. While other types of jellyfish love the warm waters. The jellyfish prefer to live in groups together. The can live in oceans and also freshwater.

yes they do.

http://www.enchantedlearning.com/subjects/invertebrates/echinoderm/Seaurchin.shtml

These tube feet have suction disks that enable the animals to crawl or attach themselves to objects. Think of a starfish "clinging" to the walls of the inside of a fish tank

Brittle stars defend themselves by hanging on tightly to rocks and other things so predators have a hard time carrying them away. Also, if a piece of their bodies is broken off, they can regenerate.

No they don’t bite. Once out of water they die.

The sunflower sea star (Pycnopodia helianthoides) is a large predatory starfish with 15-26 limbs called rays. They can grow up to an arm span of 1 m (3 ft.) in diameter. The colour of the sunflower starfish ranges from bright orange, yellow and red to brown and sometimes to purple, with soft, velvet-textured bodies and 16-24 arms with powerful suckers

The nervous system of a starfish is not very advanced, but starfish are still able to sense things in their environment. Cells on the starfish are able to sense light, temperature and other changes in their environment.

The general process is called regeneration. Some species of starfish reproduce by fission using regeneration to make each half into a full and separate organism.

The pyloric caeca are finger-like projections located in the digestive system of some fish and certain invertebrates. Their primary function is to enhance digestion and nutrient absorption by increasing the surface area for enzymatic activity and nutrient uptake. They secrete digestive enzymes and can also store food temporarily, aiding in the overall efficiency of the digestive process.

A lot of kelp and surrounds the sea stars' environment. Also rocks and sand tend to be included depending on the species.

And yes people i am only eleven years old : p

no they don't have ears.

it helps in:

>movement; to coordinate locomotion, to grip on substrate to withstand pressure, and act as sense organs that response to variation within the environment.

>feeding; it helps trap its prey, and with the help of the cilia it carries food to its mouth.

Interestingly, the Starfish is capable of both sexual and asexual reproduction. Which is to say they can have babies both with a partner and without one. Starfish often reproduce by what's called "free-spawning" in which they release their gametes into the water where they hopefully are fertilized by gametes from the opposite sex.

Starfish most probably gather in groups when ready to spawn, releasing chemical indicators to let other starfish know of their readiness. Starfish spawn are like insects, going through multiple stages of development and larval stages. Unlike adults, larval forms of starfish have distinct left and right sides.

Starfish or sea stars are echinoderms belonging to the class Asteroidea

Yes they can, because their body parts are so simple that it's easy to duplicate. Humans, on the other hand, are complicated (muscle structure, bones, tissues) so they cannot grow back.

It is a kind of starfish which has a granular texture and thus appears to be coated with sugar. They tend to be brown to orange in color and depite the name are not considered edible. They are the kind of starfish people most often associate with the name "starfish"

It comes and goes through the madreporite - a small valve-like structure on the aboral surface.

Denizens of the deeper part of the ocean such as Benthic sharks, they rarely never surface as they could not withstand the pressure differential. The term coems form a Greek word, Benthos, for extreme depth. There was a device called a Benthoscope which was a type of Diving Bell and held some manned-depth records in The Thrities or Forties. Benthic sounds better than, say Abyssmal which has negative characteristics of dirty or filthy.

It depends what type of starfish you are talking about and whether it is in its own environment or introduced. If it is in its natural environment, it would eat and be eaten, but if it is an introduced species (e.g. Northern Pacific sea star) it may not have any predators and be competing for food with the native wildlife.

It doesn't help the starfish move it

helps it so it can eat.

Sea Stars otherwise known as Star Fish are Echinoderms and they do not have an exoskeleton, they have an endoskeleton.