General Fish PT1
What allows fish to breathe underwater?
Gills
What is the Neural Crest?
A group of cells that develop from the nerve cord.
Jawless fish reproduce by external fertilization. What do we call this type of fertilization?
Spawning
What is the class name for cartlaginous fish
Chondrichthyes
How does bony fish get its name
They're made up of bones
How does a Streamlined Shape aid in an aquatic animal's movement?
Lowers the friction drag of fluids
What did Jaws develop from over time?
Anterior gill arches
There are two types of Jawless fish. What are they?
Hagfish and Lampreys
How many external gill openings do sharks have?
7 external gill openings
What are the two types of bony fish
Ray-finned fish and Lobe-finned fish
What scale is made up of toothlike materials?
Placoid Scales
What are the thin filaments called in gills?
Lamellae
What are Hagfish known for?
Defensive slime
What is another name for Rays/Skates
Batoid Fishes
Which lobe-finned fish's fossils have been found in every continent?
Coelacanths
What are the classes of fish?
Agnatha, Chondrichthyes, Osteichthyes
These types of scales can be found on salmon. What scale is it?
Cycloid scales
Where can you find Lampreys AND Hagfishes? (Be specific)
Lampreys: found in freshwater in temperate regions
Hagfish: tunnels in the moderate depths and cold waters
What are spiracles?
External respiratory opening
How does the swim bladder work?
Gas diffuse out = fish sink
gas diffuse in = fish rise
What direction is the blood flow in the gills?
Opposite of the flow of water passing over it
What do Paired Fins do?
Reduce the chance of rolling, and gives precise swimming
In the class Agnatha (Jawless fish), there are two subclasses. What are they?
Myxini and Cephalaspidomorphi
Clasper
Which type of bony fish makes up 50% of the planet's living vertebrae species?
Ray-finned Fish