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.
Plankton is small plants or animals that may be microscopic in size. It floats or drifts in huge numbers in bodies of both fresh and salt water. There are two distinct types of plankton. The first is minute, often microscopic sized plants known as phytoplankton and animal organisms known as zooplankton.Within each plankton type there are many different variations or species.n fact, there are an estimated 5,000 different types of phytoplankton and thousands of zooplankton species. Many zooplankton are the eggs or larvae of larger marine animals that are classified as plankton during the early stages of their life cycle.