An alien from planet earth
This unusual, extravagant creature we see here is possibly an anemone. Its unique appearance reminds us of some kind of alien, clearly not from this earth, not even from this galaxy. However, this animal lives in the oceans and on the same land where we live.
It may be very poisonous like all anemones, so do not touch it and stay as far away from it as possible if you see one of these. Maintaining your physical integrity in good condition is imperative. This animal might be taken from the imagination of a very creative person who wanted to make some kind of monster from another galaxy. Nature is limitless.