Curated OER
Glacier Bay Pacific Halibut
The National Park Service has produced a high-quality presentation on the halibut population of Glacier Bay, Alaska. It takes the viewpoint of the marine biologists or rather, ichthyologists, who have been studying the adaptations,...
Biology Junction
Cnidarians and Ctenophorans
Cnidaria is a broad phylum of 11,000 different species from jellyfish to coral. Most Cnidarians are marine species with a few freshwater examples. A lesson presentation explains the important characteristics of different species of both...