Flagisallus

A flagisallus is a type of large fish found on Lantea, capable of surviving at ocean depths well below 1,200 feet. Due to their appearance, members of the Atlantis expedition have taken to identifying the creatures as whales, although the creatures are not mammalian. They do, however, seem fairly intelligent and possess a form of language.

In addition, flagisallus are capable of projecting auditory and visual signals; the Ancients constructed a device that could facilitate communication with them, and attempted to teach the flagisallus their own language. The flagisallus stored several details of at least one event in their genetic memory, using it to warn the Atlantis expedition of an impending coronal mass ejection. (They are also sensitive to changes in the solar magnetic field.)

Male flagisallus possess a prominent feature that easily distinguishes them from females of the species.