cnidaria
cnidarians

Some sponges and cnidaria have this kind of body form.

Cnidaria is a phylum with about 11,000 species of animals.

This is characteristic of the phylum now called the Cnidaria.

Cnidaria have no brains or even central nervous systems.

The Cnidaria often have complex life cycles, with both sexual and asexual reproduction.

Cnidaria begin to differentiate their nervous systems in the late gastrula.

Corals themselves are tiny animals which belong to the group cnidaria (the "c" is silent).

They were once considered as parasitic protozoa, but are now known to be members of the phylum Cnidaria.

Corals are formed by small animals, the polyps of the phylum Cnidaria.

Cnidaria give their symbiotic algae carbon dioxide, some nutrients and a place in the sun.

Their appearances are that of basic invertebrates such as flat worms, mollusks, and cnidaria.

All known cnidaria can reproduce asexually by various means, in addition to regenerating after being fragmented.

Taxonomic classification systematics within the Cnidaria, as with all organisms, are always in flux.

The sister group of the Cnidaria is the Ctenophora, the comb-jellies.

The nematocyst is the stinging apparatus of the phylum Cnidaria.

Cnidaria take their name from special cells which have organelles that sting: the nematocysts.

Hydra, a genus belonging to Cnidaria, is used as a model organism to study nerve nets.

They may have represented cnidaria, but their affinity within the Metazoa is difficult to constrain.

The group was previously thought to be related to the corals and placed in the Phylum Cnidaria.

She was a specialist in Porifera and Cnidaria.

Nephtheidae is a family of soft corals in the phylum Cnidaria.

Medusa jellyfish are a life stage exhibited in some species of the phylum Cnidaria.

Most researchers believe them to be basal among the bilateria, slightly more derived than the Cnidaria.

The Hydrozoa are a class of the phylum Cnidaria.

First Cnidaria, and probable annelids, about 580 million years ago, in the Ediacaran period.