Actinia is the biological name of:

Explanation

Option A: The biological name of sea anemone is Actinia. They are a type of cnidarian, which are animals that have stinging cells. Sea anemones are found in shallow marine waters all over the world. They attach themselves to rocks or other hard surfaces and use their tentacles to capture prey. Option B: Corals are also cnidarians, but they are more closely related to jellyfish. Corals are colonial animals, which means that they form large colonies of individual polyps. The polyps are connected by a common tissue and share a digestive system. Corals are found in warm, shallow waters and build reefs. Option C: Obelia is a type of hydrozoan, which is another type of cnidarian. Hydrozoans are similar to sea anemones, but they are typically smaller and have a more delicate body structure. Obelia is found in freshwater and marine habitats. Option D: Jellyfish are also cnidarians, but they are more closely related to box jellyfish than to sea anemones. Jellyfish are free-swimming animals that have a bell-shaped body and trailing tentacles. They are found in all oceans of the world. Option E: Frogs are not cnidarians. They are amphibians, which means that they spend part of their life cycle in water and part on land. Frogs are found on all continents except Antarctica.