1. Title: 17.5 Fish Page #: 97 Date: 4/23/2013
Table of Contents
Title: 17.5 Fish
Page #: 97
Date: 4/23/2013

2. Objective
Students will be able to Identify and describe major features of fishes.

3. Word of the Day
Air Bladder: an air-filled sac at the top of the body cavity in bony fishes, serving in most to regulate hydrostatic pressure. Also called swim bladder.

4. 17.5 Fish Facts Pg. 431 Fish are the most abundant nekton.
Found at all depths of the ocean.
Distribution is determined by dependency on ocean’s primary producers.
Surface waters support large populations because there are more food resources.

6. 17.5 Fish
Features
Pg. 432
Features of fish are determined by their environment and behaviors.
Fins: Used to provide movement.
Used to change direction, turn, balance, and break.
Air / Swim Bladder: Most fish have an air filled sack in their body that allows them to float.
Air enters the sack either through the fish’s mouth or from its bloodstream.

8. 17.5 Fish Shape Pg. 432 May be streamlined to move fast.
Tuna.
Marlin.
May be laterally compressed to move slowly around reefs and shorelines.
Snapper.
Butterfly fish.
May be flattened to live on the bottom.
Sole.
Halibut.
Flounder.
May be elongated to live in soft sediment and under rocks.
Eels.

9. Striped Marlin
Blue Fin Tuna

10. Red Snapper
Copperband Butterfly Fish

11. Sole
Halibut. Note: Both of these fish have their eyes on one side of their head.

12. 17.5 Fish
Shape
Pg. 432
Flying fish use fins to glide over sea surface.
Mudskippers use fins to walk.

13. 17.5 Fish Schooling Pg. 432 Schools: Groups of fish moving together.
May be a few fish, or millions.
Herring schools may be 15 km long and 5 km wide (9 x 3 miles.)
Normally, schools are of the same species.
Schools have no leaders.
Fish constantly change position.
Schools may have developed as protection.
Each fish has less of a chance of being eaten in a school.

14. School of Atlantic Herring in ocean.
School of Atlantic Herring that was stranded at low tide.

15. 17.5 Fish 2 Groups Pg. 432 There are 2 Groups of Fish:
Fish with skeletons of cartilage.
Sharks, Skates, Rays.
Fish with skeletons of bone.
Most fish that we eat.

16. 17.5 Fish
Classwork: Floaters Activity.