Name: _______________________________________________ Block: _______ Due Date: _______________________

Fish Coloring Worksheet The fishes include the jawless fishes (class Agnatha), the cartilaginous fishes (class Chondrichthyes), and the bony fishes (class Osteichthyes). They exist in fresh and marine waters at all depths in all parts of the world. Color the representatives of the class Agnatha and related titles. The hagfish and the lamprey are the principal living agnates ("circular mouth"). They are the most “primitive” of the fishes and are somewhat similar in structure to the Ostracoderm fossil. The agnates have a smooth, scaleless skin and are soft to the touch. They lack a complete cartilaginous skeleton but do possess a prominent notochord. Paired appendages are lacking, as are upper and lower jaws. In the place of jaws is an oral sucker, in the center of which is the mouth cavity. Agnates are found in fresh and marine waters. The lamprey, during one part of its life cycle, is also found in fresh water. Many lampreys are parasitic on fish and often kill them. A representative agnate, the lamprey and its larval form (Ammocoetes), can be colored on page 2. Color the representatives of the class Chondrichthyes and related titles. Members of the class Chondrichthyes (chondros = cartilage; ichthyes = fish) include the sharks, skates, rays, and ratfishes. These fishes are characterized by an absence of bone in a largely cartilaginous skeleton more extensive than that found in the agnates. These cartilaginous fishes, the first to exhibit paired fins, also have cartilaginous upper and loosely articulated lower jaws with significant array of teeth. The skin is covered with teethlike denticles. These fishes are largely predaceous. They can be found in most marine waters and, in certain circumstances, freshwater as well. Sharks lack a swim bladder (providing buoyancy in many other fishes) and therefore will sink to the bottom when not swimming. The ratfish (Chimeras) are significantly different from the other members of this class in having membrane-covered gill silts and smooth, scaleless skin. The dogfish, a representative shark, can be colored on page 2. Color the representatives of the class Osteichthyes and related titles. The bony fishes (ostco = bone; ichthyes = fish) are characterized by a largely bony skeleton, with few exceptions (sturgeon). Of all the fishes, the bony fishes are the most numerous and are commercially significant to humans as source of food. There is great diversity the shape of bony fishes, ranging from the bottom-dwelling flatfishes (halibut and flounders) to the sea horses. There are thirty orders of ray-finned fishes that make up the vast majority of this class. The lungfishes, of different subclass, possess a swim bladder used as a lung for gas exchange. The perch, a representative member of this class, can be colored on page 2.

Label the caudal fin, dorsal fin, pelvic fin, anal fin, pectoral fin, scales, and operculum.

Look at the labeled structures on the fish diagram below. Color these structures according to the prompts below:

Color the parts of the digestive system blue.

Color the parts of excretory system yellow.

Color the parts of the respiratory system orange.

What is the function of the swim bladder?

Anatomy of a Bony Fish Using the information on the previous pages, label the fish below. Use the accompanying figure to answer the question below. Interpret what predatory and defense advantages cartilaginousfish would have over jawless fish.

Fill out the table below.

Type Description Example

Ray-fin

Lobe-fin

Use the accompanying image to answer the questions below. Identify the fins labeled A-E in the drawing.

A. ______________________________________

B. ______________________________________

C. ______________________________________

D. ______________________________________

E. ______________________________________