2. Social Behavior Schools- when fish aggregate together
Protection- apparent size, reduces chance of getting eaten for the individual
Feeding-Collectively round up prey
Mostly bony fish school.
Same size and species.
Hammerhead is known to school.

4. Migration
The regular movement of an organism from one location to another.
Daily, yearly or only once in a lifetime
Salmon
Salmon are anadromous- Fresh to salt and back to fresh

5. Reproduction CLOACA- opening for digestive and reproductive systems
HERMAPHRODITIC- an animal has the reproductive organs of both sexes
INTERNAL FERTILIZATION- cartilaginous fishes with claspers
EXTERNAL FERTILIZATION- spawn (release gametes into H2O)

7. 3 types of development OVIPAROUS- eggs are hatched outside the body
VIVIPAROUS- young develop inside the mother
OVOVIVIPAROUS- eggs are retained inside the mothers body and hatch inside. Live young are birthed.