Spectrum Brands Pet presents Cosmic Blue and Electric Green GloFish Sharks. Not actual sharks, but members of the minnow family, these are the largest GloFish fluorescent fish. Bottom-dwelling scavengers, GloFish Sharks are a great addition to any tank—they clean up leftover food, unsightly algae and small nuisance snails. They play well with other GloFish species such as danios, tetras and barbs, and get along with other nonfluorescent community fish. Like all GloFish, they are not injected, painted or dyed. They get their stunning color from a fluorescence gene and are best viewed under GloFish lights.