whale
Plankton are microscopic sea creatures, and the term includes both animals and plants.
Algae
Some are called single celled organisms. But I am not sure if all of them are called that though.
Other, even smaller animals.
Plankton
Plants in the ocean are mostly microscopic in size because being small allows them to maximize their surface area for nutrient absorption and light capture. This is important in the ocean where resources are limited. Additionally, being small helps these plants to better withstand ocean currents and turbulence.
Plankton are microscopic organisms that live in the ocean. Zooplankton are tiny animals. Phytoplankton are tiny plants. Some examples of phytoplankton include many types of algae, or single-celled plants.
How does what influence animals in the ocean?
They are microscopic marine plants that are the beginning of the food chain in the ocean.
Large amounts of dissolved nutrients are brought to the ocean's surface.
Plankton, Zooplankton, Planaria, Algae (Algae are plants, growing in the water.) {Wrong category: This isn't a Gorillas category question: this is a Marine Animals or Marine Plants question, or an Ocean or Water question.}
Answer is The epipelagic zone