Mst live in salt water. May be deadly if eaten. It is a poisonous puff fish that if not cut correctly and is eaten it is poisonous and shuts down everything even the brain. Most do not feed on chlorophyll, but must eat other organisms to survive.
Dinoflagellates are single-celled organisms with two flagella, occurring in large numbers in marine plankton and also found in fresh water. Some produce toxins that can accumulate in shellfish, resulting in poisoning when eaten.
When the fire algae is in a large goroup it makes a toxin that makes the water a redish color, calleed Redtide.If so dont swim in it or fish or drik it. It could cause death.