Fish & Sharks Review

Classes of Fish

200

The prefix "osteo-" means this.

Bone

400

This primitive class of fish has an eel-like body, circular mouth, and no scales.

Class Agnatha

600

This class of fish is characterized by having a skeleton made of bone.

Class Osteichthyes

800

This class of fish has no bones besides the teeth and jaw, the rest is cartilage.

Class Chondrichthyes

1000

This class of fish is the largest class of vertebrates with over 29,000 species.

Class Osteichthyes

Shark Anatomy

200

This type of fin is located on the top of the fish along the center of the back.

Dorsal Fin(s)

400

This type of scale is tooth-like and embedded in the skin.

Placoid scales

600

This is a male shark reproductive organ.

Clasper

800

Sharks can have these two types of teeth.

Serrated and pointy

1000

These are small organs found within pores on the head of the shark and are used for both navigation and to detect electrical impulses in the muscles, brain, and heart of nearby animals.

Ampullae of Lorenzini

Fish Anatomy

200

This type of scale is smooth and circular.

Cycloid scales

400

The fish's swim bladder helps to control this.

Buoyancy

600

This is a system of sensory organs found in both fish and sharks which is used to detect movement and vibrations.

Lateral line

800

Fish have this kind of caudal fin.

Homocercal

1000

This is used to protect the gills and to prevent fish from having to swim constantly to breathe. 

Operculum

Fish Body Forms

200

Fish with this body shape are flat and are typically found on the seafloor or "flying" through the water

Depressed

400

This is a coloration characterized by a light ventral side and a dark dorsal side.

Countershading

600

Fish with this specialized coloration are more likely to sustain an attack to the tail than to the head leading to a higher chance of survival.

False eyespot

800

This tactic for avoiding predators allows fish to appear larger, makes it harder to catch any one single fish, and allows for more efficient swimming.

Schooling

1000

This body shape is streamlined, strong, and fast (i.e. barracuda)

Fusiform

Shark Attacks

200

This type of shark attack occurs when a shark bites only once and then leaves upon realizing its not normal prey.

Hit-and-run attack

400

This amount of shark attacks happen each year on average.

70

600

This state ranks the highest for amount of shark attacks (48% of attacks happen here)

Florida

800

This type of shark attack is often fatal, and involves a shark circling or nudging a victim before launching a targeted attack with follow-up bites.

Bump-and-bite attack

1000

Shark attacks lead to an average of this many deaths per year.

6 deaths