Cetacean Probe

The Cetacean Probe was a device created by a distant race of aliens to search for other intelligent species.

Original Debut
Pre-dating voltron's castle ship by half a million years, it encountered many worlds and species, including the Borg, who attempted to assimilate it. They failed, but did succeed in damaging its crystal memory.

Trivia
At a staggering 50 miles (80 km) long, it may have been large enough to have been seen by Lance when he was a boy, all the way down from Cuba.