This disc offers a pair of episodes from a documentary series about aquatic environments and their citizens. Both episodes, "Seasonal Seas" and "Coral Seas, are presented in standard full-frame transfers. The English soundtracks are rendered in Dolby Digital Stereo. There are no subtitles, but the soundtracks are closed-captioned. Supplemental materials include additional facts, still photo galleries, trailers, and a making-of featurette. This is an excellent disc for those with an interest in the topic, as well as for teachers. The shows are narrated by David Attenborough.