The name Lorelai comes from a rock that "murmurs" (actually, reverberations from a nearby waterfall) located in the river Rhine in Germany. One legend associated with this rock involves a young maiden driven to suicide and jumping from it. Upon killing herself she became a siren, luring boats to their demise. The "murmuring" of the rock is said to be the maiden singing.
Lorelai appears as a mixture of a mermaid and an angler fish, with a female-like torso serving as bait to lure victims in so the fish can devour them. The creature's bright red underside acts as the mermaid's tail. When idle, the main body of the fish is rendered semi-transparent, giving the impression of being just a mermaid swimming around. Upon approach, the fish will either lunge forward or attack by spewing an icy breath.