Multiple choice

Sea appear red (Red tides) is done by

  1. Yellow dinoflagellates

  2. Green dinoflagellates

  3. Red dinoflagellates

  4. All

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Red tides are caused by the rapid multiplication of red dinoflagellates like Gonyaulax, which release toxins that can kill marine life.