Sea Butterfly photographed by Ingo Arndt. Tiny marine shelless snails known as sea butterflies take many forms, including heart-shaped, such as this species in Antarctica's Weddell Sea. via National Geographic
Predatory Tunicate by Norbert Wu. The predatory tunicate is a species of tunicate which lives anchored along the deep sea canyon walls and seafloor, waiting for tiny animals to drift or swim into its hood-shaped mouth.