Though not a unique species, the mysterious world of colorful lobsters found its way into the spotlight this year when a high school freshman caught a beautiful (and extremely rare) blue lobster off the coast of Portland, Maine. Oceanographers estimate that the genetic defect that gave this lobster, affectionately named "Skylar," his brilliant blue hue makes him a 1-in-2 million find.
Even rarer defects exist, making lobsters calico or solid yellow (1-in-30 million), half-black and half-orange (1-in-50 million), or completely transparent (1-in-100 million) - making the lobster appear to be made of crystal.
6. Giant clam