What specialized cells do cnidarians use for protection

Cnidarians have special cells called cnidocytes, or commonly known as stinging cells, which contain organelles called nematocysts, or stingers.

i would say the prokaryotic cells the prokaryotic cells are less complex, are usually found only in unicellular organisms and have more limited capabilities than eukaryotic cells.

straight or amphibians are homeothermic to thermal