Answer:
Dinoflagellates are classified as members of the Protista Kingdom.
Step-by-step explanation:
The responsible organisms, Dinoflagellates, are classified as members of the kingdom Protista. It is also considered an algal protist. When it grows uncontrollably it is called a "bloom". This bloom is not always harmful, but when it is, it can prove fatal to many other organisms in its food chain.