Plankton

Ocean's floating life

Plankton are tiny organisms that drift in bodies of water, unable to swim against currents.

They include both plant-like phytoplankton, which photosynthesize and form the base of aquatic food chains, and animal-like zooplankton, which feed on other plankton.

Despite their microscopic size, plankton are ecologically massive—they produce much of Earth's oxygen and sustain marine life from small fish to whales.

The whale shark filters plankton through its gills.

organisms

copepods

Minute aquatic crustaceans

  • krillSmall marine crustaceans
  • diatomsSingle-celled silica algae
  • algaePrimitive aquatic photosynthesizers

larvae · cyanobacteria · jellyfish · amphipods · flagellates · nauplii

ecology

food chain

Ecological feeding hierarchy

oxygen · nutrients · biomass · grazing · predation · filter feeding · decomposition · nitrogen fixation · chlorophyll · productivity

marine

ocean

Massive saltwater body

drifting · currents · marine · aquatic · saltwater · freshwater · surface · depth · bloom · swarm

scientific

sampling

Extracting subset for study

  • netFinal amount remaining
  • towPull something behind
  • microscopeInstrument for viewing minute objects

taxonomy · classification · study · research · oceanography · limnology · specimen · identification · culture · laboratory

character

SpongeBob

Absorbent animated sea creature

Krabby Patty · scheme · Bikini Bottom · Karen · tiny · green · evil · restaurant · rival · Nickelodeon

Categories
Opposites
locomotion/agency

Planktonnekton

Self-propelling aquatic organisms

fish · dolphins · sharks · squid · whales

size in marine ecology

Planktonblue whale

Largest mammal on Earth

whale · leviathan · megafauna · whales · apex predators

ecological role

Planktonapex predator

Unpreyed-upon dominant hunter

killer whale · great white shark · orca · barracuda · predator

Phrases
Family

phytoplankton, zooplankton

Familiarity
Top 500,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G