Which of the caulerpa taxifolia’s traits make it so dangerous to local ecosystem

Caurepa taxifolia is an invasive species of algae and is listed in the IUCN list of 100 invasive species.

Explanation:

In is an algae usually found in the pacific ocean. It was earlier used in aquariums as  an ornamental species of algae. The dangerously invasive nature overshadows its attractive appearance.

It is inedible and  increases in numbers at a surprisingly accelerated rate.  The growth of other plants is difficult in areas dominated by the Caurepa taxifolia. The introduction of this algae was in the Meditteranian sea.

For anyone who believes that the answer is "regeneration," that's incorrect.