Ocean
The branch of biology that explores organisms living in or around the ocean
Marine biology
What is the ocean layer closest to the surface called?
sunlight (epipelagic)
What do fish have that helps them regulate where they are in the water column. Rise or sink
air bladder
plants
Define ecosystem
a community of orangisms that interact with each other and their physical environment
The deepest layer of the ocean
trench layer (hedapelagic)
What are the 2 types of Cartilaginous fishes?
Sharks and rays
Where is the mouth located on a ray?
underside of it's body
What is the part of seaweed that looks like plant roots but is not actually a root called. Connects them to a hard surface
holdfast
No sunlight can reach this layer. Water temperatures are near the freezing point It is the 4th ocean layer
abyss (abyssopelagic)
polyp and medusa
What is one of the largest sharks?
whale or basking shark
An organism that cannot swim at all or not strong enough to move against the ocean current
plankton
2nd layer of the ocean. some sunlight can reach, but not enough for photosynthesis
twilight (mesopelagic)
What are the two types of whales?
Name one difference between sea lions and seals
sea lions have visible ears & can "walk" with their rear flippers
What do cyanobacteria do that is very important for all other living organisms?
Convert nitrogen gas and transform it into something other organisms can use.
3rd layer of the ocean - no light except what the sea creatures make themselves
midnight (bathypelagic)
What is a close living situation between 2 species where at least one of the species benefits called
symbiosis
How many radiating parts do echinoderms have?
5