Is a jellyfish a sponge or cnidarian?
Sponges are also called sea sponges. Cnidarians include jellyfish and corals.
Are sponge and jellyfish related?
Sponges are similar to what might have been the ancestor of animals: colonial, flagellated protists. The cnidarians, or the jellyfish and their kin, are the simplest animal group that displays true tissues, although they possess only two tissue layers.
What kingdom are jellyfish and sponges in?
Cnidaria
| Cnidaria Temporal range: Ediacaran–Recent | |
|---|---|
| Four examples of cnidaria : A jellyfish Chrysaora melanaster A gorgonian Annella mollis A rocky coral Acropora cervicornis A sea anemone Nemanthus annamensis | |
| Scientific classification | |
| Kingdom: | Animalia |
| Subkingdom: | Eumetazoa |
What are the classifications of a sponge?
Sponges are classified within four classes: calcareous sponges (Calcarea), glass sponges (Hexactinellida), demosponges (Demospongiae), and the recently-recognized, encrusting sponges (Homoscleromorpha).
How are sponges and protists different?
A sponge is, in essence, a multicellular organism with no organs or tissues, but with specialized cells, which distinguishes it from small multicellular protists.
Is a sponge a cnidarian?
Sponges belong to Phylum Porifera. Cnidarians belong to Phylum Cnidaria.
What biologists think sponges were?
Since sponges look like plants, it is understandable why early biologists thought they were plants. Today, we know that sponges are simple, multicellular animals in the Kingdom Animalia, Phylum Porifera. This phylum is thought to represent the transition from unicellular animals to multicellular animals.
What is the relationship between sponges and Cnidaria?
Sponges vs Cnidarians One interesting difference between sponges and cnidarians is that sponges lack tissue while cnidarians have tissues but not the organ systems. Sponges and Cnidarians are very primitive acoelomic invertebrates with very simple body structures. Both organisms are found in aquatic ecosystems.
Do sponges have Cnidocytes?
Tentacles surround mouth and have stinging cells (cnidocytes) containing stingers (nematocysts). Two major body forms: Polyp: mouth directed upward, mesoglea thin, animal usually attached; Medusa: free-swimming “jellyfish” with thick mesoglea; mouth directed downward.
What are the 3 sponge classes?
The approximately 5,000 living sponge species are classified in the phylum Porifera, which is composed of three distinct groups, the Hexactinellida (glass sponges), the Demospongia, and the Calcarea (calcareous sponges). Sponges are characterized by the possession of a feeding system unique among animals.
Is sponge a type of protist?
What are polypoid and medusoid cnidarians?
There are two types, called polypoid and medusoid. Polypoid cnidarians have tentacles and a mouth that face up (think of an anemone or coral). These animals are attached to a substrate or colony of other animals. Medusoid types are those like jellyfish – the “body” is on top and tentacles and mouth hang down.
What is an example of a medusoid?
Examples of the polyp form are freshwater species of the genus Hydra; perhaps the best-known medusoid animals are the jellies (jellyfish). Polyps are sessile as adults, with a single opening to the digestive system (the mouth) facing up with tentacles surrounding it.
What phylum is a jellyfish in?
The Cnidaria (Cnidaria spp.) is the phylum of animals that contains corals, jellyfish (sea jellies), sea anemones, sea pens, and hydrozoans. Cnidarian species are found throughout the world and are quite diverse, but they share many similar characteristics.
What are sponges and cnidarians?
The sponges and the cnidarians represent the simplest of animals. Sponges appear to represent an early stage of multicellularity in the animal clade. Although they have specialized cells for particular functions, they lack true tissues in which specialized cells are organized into functional groups.