I kept an American Lobster (Homarus americanus) alive for two years in a classroom 50 gallon aquarium. Later, the critter grew too large and received a new home at the New England Aquarium in Boston, Ma.
Clawed lobsters are actually fascinating critters to keep. "Jaws", the pet lobster waved to the kids in the morning (he thought fingers were food) and he constantly arranged his domicile. He had rock stacking and arranging to an art. He was also quite destructive with anything that came into his tank. Glass thermometers, hydrometers, tubing all met similar ends. He was a load of fun for everyone and taught the kids quite a lot about the life cycle of the lobster and why it's a good idea not to harvest large breeders (over several pounds)
I am assuming you have an "Omer" type lobster. If you're serious about keeping one long term PM me. If you're going to fatten him up and boil him...never mind.
