What is the plural form of the word "cactus"?

Even the explanation says that both cacti and cactuses are considered correct.

My buddy and his father are both named Otis. When they are together we call them, "Oti."

linguist here. the worde cactus is actually stemming from greek origins, so the plural is cactipodia, not cacti as everyone thinks.

l knew the answer because if a recent conversation at work about Cacti / Cactus .