Ancient Fish
This fish, with the most basic body form, create significant amounts of slime to help it burrow through prey
hagfish
How can you tell the difference between a skate/ray and a flat shark?
Check where the gills are!
Found on male sharks but not female sharks
Clasper fins
The class that sharks skates and rays are in
Chondrichthyes
Fish use this in order to stay together as a school
Lateral line
This fish was the first known large predatory organism in ancient oceans
Dunkleosteus
Name two differences between skates and rays
Spine, tail size, birth method, skin features
Single gill slit (vs multiple)
Swim bladder (vs liver)
Bones (vs cartilage)
This anatomical based strategy protects a sensory organ when sharks are actively hunting
Eyes roll back
Fish with subterminal mouths often use these extensions for sensory input in sand
Barbels
This lobe finned fish, once thought to be extinct, is an important evolutionary connection between aquatic and terrestrial life
Coelecanth
This is the only ray that does not have a true stinger, but relies on its size for protection
Giant Manta
pectoral fins
This color pattern is used by great whites who attack prey from depth
Countershading
This body form is observed primarily in eels and some reef fish
Anguiliform
Ancient fish developed two key features to help them survive. One withstood evolutionary time and helps with hunting. One died out and was hypothesized as a nutrient storage system. What are thse two features?e
Jaws, Armor
Since their gills are on the underside skates and rays primarily rely on these structures to breathe
Spiracle
These scale like projections give sharks a rough but hydrodynamic skin
Dermal Denticles
These pores covering the snout of the shark are filled with electrosensory gel.
Ampullae of Lorenzini
Name 3 key differences between fish and sharks
- gill slits vs operculum
- swim bladder
-scales vs denticles
-teeth
The name of the era in which 70% of marine life underwent a mass extinction, and armored fishes were lost
Devonian (devonian extinction)
The term that describes how skates are rays are 'flattened'
dorsoventrally
This reproductive strategy includes embryo development in an egg while remaining inside of the parent organism
Ovoviviparous or ovoviviparity
Name three large chondrichtyhes that specialzie in filter feeding strategies
Manta, Whale Shark, Basking shark
What are the names of the two largest groups of fish. What is the key difference between them
Sarcopterygian and Actinopterygian - lobe finned versus bony finned