Ocean Zones
This zone begins around 1,000 meters deep and is completely dark.
What is the bathyal (midnight) zone?
This word means an animal can make its own light.
What is bioluminescence?
This tiny floating organism is eaten by lanternfish.
What is plankton?
This means to go under the surface of water.
What is submerge?
Oceans cover about this much of Earth’s surface.
What is 71%?
This ocean zone is dimly lit and is also called the mesopelagic zone.
What is the twilight zone?
Lanternfish use glowing spots to blend in with sunlight and hide from predators. This survival strategy is called this.
What is camouflage?
This animal flashes bright blue rings when it feels threatened.
What is the southern blue-ringed octopus?
This means to push something out of the way and take its place, like water rising when an object enters it.
What is displace?
The southern blue-ringed octopus is deadly, but the article describes it as shy rather than this.
What is aggressive?
This is the deepest ocean zone, found in trenches where pressure is extreme and food is scarce.
What is the hadal zone?
This falling material made of dead plants, animals, and waste provides food in deep water.
What is marine snow?
These tiny organs on a lanternfish’s body produce light.
What are photophores?
This means to produce, create, or result in something.
What is yield?
Lanternfish may use side photophore patterns to communicate with possible mates, which has helped create more of this among lanternfish species.
What is diversity?
This deep zone includes hydrothermal vents and animals that may rely on chemosynthesis instead of sunlight.
What is the abyssal zone?
Bacteria near hydrothermal vents use chemicals instead of sunlight to make food. This process is called this.
What is chemosynthesis?
The southern blue-ringed octopus mostly eats these small ocean animals, such as crabs and shrimp.
What are crustaceans?
This is the force of water pushing up on an object, helping it float.
What is buoyancy?
This is the ocean-floor realm, including the seafloor and sediment layer.
What is the benthic realm?
This is the ocean zone where photosynthesis can happen.
What is the sunlit (photic) zone?
Lanternfish travel deeper during the day and closer to the surface at night. This movement helps them find food and avoid these.
What are predators?
This tiny plant-like ocean organism produces a large amount of Earth’s oxygen.
What is phytoplankton?
When an object displaces enough water to balance its weight, this can yield this result.
What is floating?
This is the open-water realm of the ocean, not near the bottom or shore.
What is the pelagic realm?