Frilled anemones are typically consumed by sea stars, nudibranchs, and some species of fish that can tolerate their stinging tentacles. Additionally, some crabs and shrimp may also feed on frilled anemones.
Cnidarians have a simple body structure with a central digestive sac called a gastrovascular cavity. They also have tentacles with stinging cells called cnidocytes, which are used for capturing prey and defense. Some cnidarians have a polyp form (like sea anemones) while others have a medusa form (like jellyfish).
Hydras typically exhibit faster responsiveness compared to sponges due to their ability to move and capture prey with their tentacles. Sponges, on the other hand, have a more limited response as they rely on water flow to filter feed and lack the ability to actively move to capture prey.
If a cnidarian lost its stinging cells, it would lose its primary defense mechanism against predators and its ability to capture prey. This would make the cnidarian more vulnerable to predation and reduce its efficiency in obtaining food.
Cnidarians belong to the Kingdom Animalia. They are characterized by their radial symmetry, tentacles with stinging cells called cnidocytes, and a simple nerve net.
Cnidarians have specialized stinging cells called cnidocytes, which contain nematocysts. Nematocysts are capsule-like structures that can discharge venomous barbs or threads when triggered, allowing cnidarians to capture prey or defend themselves.
Examples of cnidarians include jellyfish, corals, sea anemones, and hydroids. Cnidarians are characterized by their radial symmetry and specialized stinging cells called cnidocytes that they use to capture prey.
Hydras are small aquatic organisms that are typically consumed by larger predators, such as fish, turtles, and birds. Additionally, some invertebrates like crustaceans and other aquatic insects may also feed on hydras.
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They are a special type of ectotherm called a poikilotherm meaning they have the same body temperature as their ambient surroundings.
A hydranth (feeding polyp) will have a hypostome, mouth and tentacles. A gonangium (reproductive polyp) will have medusa buds and gonotheca. The medusa buds will become free swimming Medusa to sexually reproduce by the female releasing an egg and the male releasing haploid sperm. After fertilization, the zygote develops into a ciliated, swimming planula larva which will settle to the ocean floor attaching itself to the substrate. A new generation of polyps then begins to form through asexual budding.
It has a single layer of cell.
Lay a paper on a flat surface. With your hands on the surface, push two sides together until you make something that looks like a polyp. Voila! Something similar to a crosssection of a sponge. Think of the paper as cells in a single line.
Cnidarians and sponges receive most of their food from filtering water; they would starve without water. Also, they would most likely crush themselves because of their body weight if they were on land.
the new bud simply detaches from the parent body
Yes, for example, Jellyfishes are Cnidarians.
They could sting people.
i think a hydra has a incomplete digestive system called the-gastrovascular system