Desktop-sized fish tanks are pretty common. Desktop-sized jellyfish tanks are not. This Jellyfish Tank ($350) was developed from the ground up specifically for Medusozoa by the experts at Jellyfish Art, and features full-spectrum energy efficient LEDs for illumination, an air diffuser for maximum oxygenation, built-in biological, chemical, and mechanical filtration, a bubble channel to shield the jellyfish from the air, and an included voucher good for three of the little menaces as well as a pack of food.