Jawless fish
One thing jawless fish lack that their descendants have (besides a jaw)
What are paired fins, a stomach, scales?
Skeletons of them and their descents are made of this
adaptation Gnathostomata have that lampreys and hagfishes do not
What are jaws?
this is unique about this classes teeth, compared to the chimaeras
what is they are not fused to jaw?
how common these types of sharks are
What is rare?
The support rod that runs along the back of the fish
What is the notochord?
lampreys eat like this
what is attach with their suction cup and grind off scales and flesh?
What is plate-skinned or bony-armored?
the members of elasmobranchii
What are sharks, rays and skates
the term for dealing with freshwater, basically balancing water flow between the environment and cells (know it from environmental science maybe)
what is osmolarity?
Jawless fish have these to take in oxygen from the water
What are gill pouches?
hagfish are AKA
what are slime fish?
class acanthodii common name
What are spiny sharks?
their lipid- (fat) filled livers help with one of these things
What are controls buoyancy and saves energy?
what is bull shark?
Jawless fish have these to support the gills
What are branchial arches?
lampreys begin life in freshwater and then move into salt, this is the term for this
what is anadromous
earstones that can be used to age fish
what are otoliths?
members of elasmobranchii have this fin located on either side of their body near the gills
what are pectoral fins?
This is the only freshwater shark that is EXCLUSIVELY freshwater, and often mistaken for the more dangerous bull shark
What is the Ganges?
This describes their unique eyes
Petromyzontida members, and Myxini members
What are lampreys and hagfish, respectively?
Class sharks, rays and chimaeras belong to
3 functions of pectoral fins
What are fine-tuning, keeping balance, resting on, keeping level, keeping from rolling, help steer and control depth?
One species is named for the Greek word Glyphis, because of the shape of their teeth. Glyphis means this in English
what is knife?