The Ultimate Vampire Resource and Directory

"The Vampires of Venice"
The Eleventh Doctor, Rory Williams and Amy Pond encountered vampire-like aliens in 16th century Venice in "The Vampires of Venice". They were able to breathe underwater and had vampire-like qualities such as a vulnerability to sunlight, no reflections and a thirst for [human blood]. Their leader, Signora Rosanna Calvierri, has a perception filter that allows herself and her family to take humanoid forms, except for her brood which lived under the river. They planned to flood Venice in an attempt to continue their civilization since their own planet Saturnyne was destroyed by cracks. When the Doctor foiled their plan, Rosanna committed suicide by allowing her brood to devour her.