A new deep-sea shark, Rhinochimaera costaricana, has been identified off the Pacific coast of Costa Rica. That changed with the use of modern genetic tools, which helped researchers re-examine older specimens such as this ghost shark. A preserved deep-sea “ghost shark” specimen showing the long-snouted body shape and wing-like fins. Close up of a deep-sea ghost shark specimen showing its elongated snout and eye detail. The case of this ghost shark shows that the deep ocean is still far from fully catalogued, with each new analysis revealing how incomplete the picture remains.