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.
Confidence votes 19. Most plankton, known as phytoplankton, (but not all) eat in much the same way as do plants-through photosynthesis, the process by which sunlight is converted into food energy. More. Planktonic animals mostly eat other plankton, incluing the planktonic plants described above, and smaller animals which are also plankton. The smallest of the plankton can eat bacteria and detritus, but the largest of the plankton are true predators.