Biology:Bull kelp
From HandWiki
Bull kelp is a common name for the brown alga Nereocystis luetkeana which is a true kelp in the family Laminariaceae. Species in the genus Durvillaea are also sometimes called "bull kelp", but this is just a shortening of the common name southern bull kelp. Durvillaea is a genus in the order Fucales and, though superficially similar in appearance, is not a true kelp (all of which are in the order Laminariales).
Bull kelp and southern bull kelps
Bull kelp (Nereocystis luetkeana) at Caspar Point, California
Southern bull kelps (Durvillaea) in Otago, New Zealand
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