1 In-office bleaching is more expensive than take-home alternatives. 2  Its cost, on average, is $650, compared to $400 for take-home trays and under $100 for over-the-counter bleaching trays or whitening strips.
Sheldon James Plankton, or simply Plankton, is a character in the Nickelodeon animated television series SpongeBob SquarePants.Although usually an antagonist, he is frequently shown as a protagonist or an antihero. He is voiced by Mr. Lawrence and first appeared in the episode  Plankton!  on July 31, 1999.heldon James Plankton, or simply Plankton, is a character in the Nickelodeon animated television series SpongeBob SquarePants.
However, the most common plankton are protists, nanoplanktonic flagellates, cnidarians, ctenophores, rotifers, chaetognatha, veliger larvae, copepods, cladocera, euphausids, krill and tunicates. Protists produce energy by photosynthesis and form the base of marine food webs as primary producers.ioluminescent Noctiluca scintillans (a dinoflagellate). Plankton is composed of the phytoplankton (the plants of the sea) and zooplankton (zoh-plankton) which are typically the tiny animals found near the surface in aquatic environments.