Plankton

Plankton are the most important part of the food web, because if plankton disappeared, it would create a domino effect and kill all other animals in the oceans. Because other plankton and small fish eat zooplankton, then small fish eat them, then bigger fish eat them, then squids eat then, then sharks. So even though sharks don't eat plankton, they would still die and go extinct if there was no plankton. 2 main categories are meroplankton and holoplankton. Meroplankton are plankton for only part of their lives usually the larval stage. Holoplankton are plankton for their entire lives. 3 benefits from plankton are: Immune booster, energy enhancer, and mood booster. They can effect your daily life by making you feel better and have more energy and be happier. 

Dinoflagellates

Dinoflagellates cause lots of problems, one of which is the Red Tide. The Red Tide is a phenomenon thats also called an algae bloom. Which is a large about of a microorganism, such as the dinoflagellates. And they take a color of red or a reddish-brown. Red tides are events in which estuarine, marine, or fresh water algae accumulate rapidly in the water column, resulting in coloration of the surface water. It is usually found in coastal areas. It caused neurological damage to humans, and it gets into things like clams tissues and toxicates them. it cannot be prevented because it is an algae bloom.