For those of us who work with coral, NOAA’s Coral Reef Watch is quite useful. It’s a online tool for tracking global sea surface temperature data in real-time. But what about temperatures, say, a quarter mile beneath the surface? There are no user-friendly websites or pretty maps for tracking anomalous temperatures in deeper waters. A recent population increase and geographic spread of the deep-water Humbolt Squid gives reason for new concern about the changing mesopelagic world.