The protist would be a volvox. It had a tail (leg) that propells it through substances. It would most likely be a volvox, also because it is big enought to be classified as a protist...
Answer:
Euglena
Explanation:
The euglenas whip through water using flagella to travel. The Volvox and Paramecia use cilia while the Amoebae use their pseudopodia.
