Where do Asconoid sponges live?
Where do Asconoid sponges live?
A more detailed look at the phylum: The 9,000 or so species are all aquatic with most representatives living in salt water, although about 100 species live in fresh water habitats. The general body plan consists of “more or less” recognizable cell types surrounding a spongocoel.
Where are calcarea sponges found?
Calcareous sponges occur mainly on the rocky bottoms of the continental shelves in temperate, shallow waters; they are usually dull in colour.
What is an example of a Leuconoid sea sponge?
All glass sponges are leuconoid sponges. Because they exist at such depths, humans have little contact with glass sponges.
What is a Syconoid sea sponge?
Syconoid sponges are similar to asconoids. They have a tubular body with a single osculum, but the body wall is thicker and more complex than that of asconoids and contains choanocyte-lined radial canals that empty into the spongocoel.
Is Spongebob a Porifera?
Spongebob is not its name, but you can call its scientific name, Porifera, or simply as Sponge. And as their name, Porifera, suggests, these pore bearing creatures filter the sea water for food and nutrients for itself, while releasing the filtered water back into the ocean.
Where do phylum Porifera live?
The phylum Porifera comprises the sponges. Sponges are simple invertebrate animals that live in aquatic habitats. Although the majority of sponges are marine, some species live in freshwater lakes and streams. They are found in shallow ocean environments to depths as great as five kilometers (km).
What are chalk sponges?
The calcareous sponges of class Calcarea are members of the animal phylum Porifera, the cellular sponges. They are characterized by spicules made out of calcium carbonate in the form of calcite or aragonite. While the spicules in most species have three points, in some species they have either two or four points.
Do Syconoid sponges have Porocytes?
The actual opening is formed by 1 cell, the porocyte. The ostia/incurrent pores in syconoid sponges are generally made of several cells. Water enters the sponge through these pores and moves into the incurrent canal. Water leaves the area of choanocytes via a much larger pore, made by many cells = the apopyle.
Are most sponges Leuconoid?
Most sponges are of the leuconoid type, as this permits the sponge to develop the most efficient water current and to attain a larger size (as it filters food from water more efficiently).
Why are Leuconoid sponges bigger?
What does Leuconoid mean?
from The Century Dictionary. Pertaining to or resembling a leucon: as, the leuconoid type of canal system in sponges. Contrasted with syconoid .
What is syconoid canal system in sponge?
Syconoid Canal System This type of canal system is slightly complicated and advanced than asconoid one with following important features: The body wall of the sponge is thick and folded with well developed mesenchyme. The radial canals that are formed by out pushing of body wall are lined by choanocytes hence better called flagellated canals.
How are sponges harvested from the ocean?
Commercial sponges, species of the genera Spongia and Hippospongia, are harvested principally in the Mediterranean and Caribbean seas and off the Florida coast. They are brought up by divers in deep water, or raked in with long-handled forks in shallow water. They are left in water until the living tissue rots away;
Where do commercial sponges come from?
Commercial sponges, species of the genera Spongia and Hippospongia, are harvested principally in the Mediterranean and Caribbean seas and off the Florida coast. They are brought up by divers in deep water, or raked in with long-handled forks in shallow water.
Do sponges reproduce sexually or asexually?
Asexual reproduction also occurs. The individual sponge is saclike in construction; water is drawn into its central cavity through many tiny holes in the body wall and expelled through a large opening at the top of the body. Hard materials of various kinds, depending on the type of sponge, are imbedded in the body wall, forming a skeleton.
