Chordate CharacteristicsEndotherms
Can maintain a constant internal Temperature
WARM BLOODED
Ectotherms
Need outside sources of heat
COLD BLOODED
Fish Characteristics25000 species
Brain that tracks senses
Sight, Smell, Hearing
Lateral Line
Rows of nerves that sense water vibration
Fish characteristics
Reproduction
External Fertilization
Unfertilized Eggs in Nest,
Male swims over & Fertilizes
Reproduction Cont.
Internal Fertilization
Female deposits Eggs in Nest
Embryos develop inside Female
Types of Fishes
Cartilaginous
Skeleton stays as cartilage
More Dense than Water - must keep moving
Keeps water moving through gills
Types of FishesBony Fish
Common
1cm - 8.6m
Skeleton of bone
Swim Bladder
Gas filled sac, control buoyancy
Bony Fishes
Two Main Groups
Ray Finned
Most bony fish
Pair of fins connected by bone
Eels, trout, minnows, pearch