US Geological Survey
Usgs: Pacific Seafloor Mapping Project
This site describes the details of a project to map the seafloor of the Pacific Ocean. Includes images, movies, links to related information, and more.
CK-12 Foundation
Ck 12: Earth Science: Seafloor
[Free Registration/Login may be required to access all resource tools.] Examines how Earth scientists study the seafloor.