Stop, it’s hammer time. Cheesy throwbacks to the 80s aside, the hammer coral is a staple in many reef tanks much like MC Hammer’s song was a permanent fixture in many a Sony Walkman. Getting past all of this nostalgia, hammer corals offer the best of both worlds for corals. On one hand, they have a hard skeleton, but on the other they are adorned with flowy, fleshy tissue that draws in those seeking a little more movement in the water. MORE: Picture of the Week, Green Hammer Coral