The Ichthyocentaur, Sea Hippocentaur, or Hippocampocentaur is a mythical marine centaur with the waist up of a human and the lower anterior half and forelegs of a horse, and the tailed posterior half of a fish (or cetacean/pinniped). In the modern days, the ichthyocentaur is a marine centaur with the waist up of a human and the waist down of a hippocampus.