Curated OER
Fishes
In this fish worksheet, students will review the characteristics of fish by comparing the jaws, skeleton, and fertilization of each fish class. Then students will use a phylogenetic tree to compare the groups of fish to ancestral...
University of California
Ucmp: Introduction to Chondrichthyes
Good introduction from Berkeley's department of paleontology, gives a brief history and the defining characteristics of the class of Chondrichthyes.
Other
Pelagic Shark Research Foundation: Glossary
A glossary for terms relating specifically to sharks, many of which are relevant to the entire chondrichthyes class.
Other
Starship Millenium Voyage: Sharks
Very good overall sharks page that concludes with two sections that include shark interactions with man and threats by man.
Other
Johns Hopkins: "Predators Promise"
A good article focused on the issue surrounding the possibility that sharks may hold some key to curing cancer.
University of California
Ucmp: Introduction to Chondrostei
Chondrostei is a mostly forgotten group of cartilaginous fish which deserves at least one page, and here it is. Good information on a cartilagnous fish.
Other
Gerontology Research Group: Sharks Do Get Cancer
An article that is interesting given the shark cartilage industry relevant to the controversy about sharks and cancer.