Starfishes, the common name for the echinoderm marine animal, also known as sea stars, have several synonyms. One of the most popular synonyms is the name Asteroidae, which translates to "star-like" in Greek. Another synonym is stellerids, which refers to the family of starfishes, named after the German biologist Georg Wilhelm Steller. Other synonyms for starfishes include echinoderms, which classifies the animals based on their spiny skin, and Ophiuroidea, which refers to a closely related class of brittle stars. Other informal names for starfishes include sea stars, five-fingered star, and cushion stars. Regardless of the name, starfishes remain a fascinating marine creature, with their unique appearance and ability to regenerate limbs.