Myrka (Warriors of the Deep)
From Tardis Wiki, the free Doctor Who reference
In 2084, a Myrka was used by the Silurians on Earth, destroying the probes which were sent out by Sea Base 4. They then used the beast to gain entry; it caused chaos, easily killing the human guards fighting it. The Fifth Doctor killed it through the use of ultra-violet light. (TV: Warriors of the Deep)
