Molluscari

The Molluscari were a race described by the Eighth Doctor as "aggressive space oysters".

Biology
The Molluscari required specific temperatures and some feasting before they could mass spawn. One Molluscari, Crassostrea, was capable of developing female parts so they could produce offspring. (AUDIO: Orbis)

Technology
The Molluscari travelled through space in clam ships. They carried information in data pearls. (AUDIO: Orbis)

History
The Molluscari were responsible for the massacre of the Tetrapoids and the firing of the Mugwater vents. (AUDIO: Orbis)