'Sea muppets' that look like seahorses are a separate fish lineage

Three rare deep-sea fish that look just like seahorses belong to their own evolutionary branch, a new study shows, meaning nature evolved the same body shape more than once. Nicknamed 'sea muppets', they are known from just seven specimens and none has ever been seen alive. One newly described species, Australyichthys aegis, lives on deep reefs off southern Australia.