Scholastic
Scholastic: Science Labelling Game
In a series of five interactive science games, students first study labeled diagrams to learn the names of the Earth's layers, of a flower's parts, of a fish's anatomy, of the human respiratory system, and of layers of the atmosphere....
Middle School Science
Middle School science.com: Perch Dissection
In this lab experiment site, you will observe the external and internal anatomy of a perch, determine the sex of a perch using internal anatomy, and collect statistical data on perch length.
Other
Pet place.com: The External Anatomy of a Fish
A very good overview of the class of fish, which includes a very good description of the external structure.
University of Florida
Florida Museum of Natural History: Ichthyology: How Fish Swim
Provides descriptions and illustrations of how fish swim.
University of Florida
Florida Museum of Natural History: Ichthyology: Fish Groups
Provides information on, and photographs of, the primitive fish classes. Discusses the Superclass Agnatha, the Class Chondrichthyes, and the Osteichthyes. Very interesting, with lots of pictures!
University of Florida
University of Florida: Fin Features and Measurements of Sharks
Some very specific information on the measurements and identifying characteristics of sark fins.
University of Florida
University of Florida: Head Features and Measurements of Sharks
Good diagrams of the external features and labels of the head of a shark, the largest member of the chondrichthyes class.
University of California
Ucmp: Chondrichthyes
Site gives a quick but decent description of the anatomy of the skin and fins.
Science Education Resource Center at Carleton College
Serc: Mn Step: The Life Cycle of a Walleye Fish
The walleye fish is the subject of this lesson where students learn and describe the parts of its body and its life cycle.
Science Education Resource Center at Carleton College
Serc: Mn Step: Southwest Mn Fish Families
Describes a lesson where students are introduced to a live fish caught locally. After discussion of its characteristics, and having students draw and label it, they listen to a storybook about fishing, and are introduced to a set of fish...
University of Florida
University of Florida: Body Features of Sharks
Somewhat shark specific, but a great look at the external anatomy of these cartilaginous fish.
Other
Look d.com: Fish Anatomy
This site, which is given by LookD.com, provides a basic overview of fish anatomy. The information is medium in length, and factual, making it worth checking out on the subject.
Other
Look D: Fish Lateral Line System
This site provides information about bony fish lateral line system.
Other
Look d.com: Fish Circulation
This site from LookD.com provides information about bony fish circulation systems. The article is very brief, only one paragraph in length, but worth checking out on the subject.
Other
Look d.com: Gas Bladder
This site, which is from LookD.com, provides information about the bony fish gas bladder. The information that is presented at this site is medium in length and interesting, making it worth checking out.
Mocomi & Anibrain Digital Technologies
Mocomi: Why Do Fish Die if They Are Out of the Water?
Dive into the biology of most fish to understand why they can only breathe while in the water. Does every fish meet its death when they are out of water?
Merriam-Webster
Merriam Webster: Dictionary Illustration: Fish Anatomy
A labeled diagram of the parts of a fish.
BiologyWise
Biology Wise: The Circulatory System of Fish
Describes the anatomy of a fish's circulatory system and how the blood circulates in a fish.