The tide is red from toxins, which are very harmful to all kinds of marine life.
Seawater that is discoloured by large numbers of certain dinoflagellates that produce saxitoxin. I don't know the effects.
dinoflagellate
Dinoflagella
Dinoflagellates in the phylum Dinoflagellata are responsible for causing red tides. These harmful algal blooms can produce toxins that contaminate shellfish when ingested, leading to a condition known as paralytic shellfish poisoning.
Algal can cause "red tides". Specifically algal blooms.
Red tide?
Dinoflagellate blooms
Red tide is caused by Algal blooms- During which, algae becomes so numerous and it may deplete oxygen and emit toxins into the air. different species in the water causes a discoloration.
It's called a 'neap' tide. When the sun & moon work together - it's called a 'spring' tide.
If you are referring to the Red Tide, then, it is a form of algae called "Gymnodinium breve". Not everyone agrees on the reason the algae booms, and causes the water to appear red, but it is said to be a natural phenomena and it's not good for the ocean life or people. you shouldn't eat fin fish that are from a red tide area, red tide produces potent neurotoxins.
the moon's force on earth causes high tide and low tide.
The effects are the moon phases, eclipses, and the high tide and low tide.