Most animals and plants are part of more than one food chain. If one part of a food chain alters, the whole food chain is affected. For example, if a disease suddenly wiped out caterpillars, it would affect mice, owls and many other animals.
This phylum consists of the jellyfish, hydra, sea anemones, corals, sea pens, sea wasps, and box jellyfish. There are about 9,000 species. Almost all are marine. This is another ancient group, with fossils perhaps reaching back to 700 mya.
sponge. common name for members of the aquatic animal phylum Porifera Porifera[Lat.,=pore bearer], animal phylum consisting of the organisms commonly called sponges.It is the only phylum of the animal subkingdom Parazoa and represents the least evolutionarily advanced group of the animal kingdom......ommon name for members of the aquatic animal phylum Porifera Porifera[Lat.,=pore bearer], animal phylum consisting of the organisms commonly called sponges.