In-Situ Sample Homogenizer. It has been designed for collecting RNA samples from deep ocean organisms. The in-Situ mRNA Sample Homogenizer (or iSMASH) is a hydraulically-powered custom blender systems that quickly homogenizes samples in an RNA preservative solution at the seafloor. The entire process takes very little time, one the order of three to five minutes, yielding high-quality transcriptomic data that are likely to be much more representative of the conditions experienced by the organisms in nature.