Deep Sea Aliens
Looking like aliens from another world, these scale worms (Polychaetes) inhabit the depths of around 3200 ft (1000 m) where it is pitch dark and the pressure is immense.
Their ability to survive in most extreme conditions, including both the freezing sub-zero temperatures of the sea floor and the almost 750 °F (400 °C) super-heated waters near the hydrothermal vents makes them capable of survival in basically any conditions found on Earth.
With size of approximately 1 in (2-3 cm), scale worms can turn their mouth inside-out in order to capture prey more effectively, contributing to their already alien-like appearance.
Due to the complete lack of sunlight, the entire surrounding of these thermal vents produces energy from chemistry rather than photosynthesis, meaning that Polychaetes are hosts to symbiotic bacteria that provides them with nutrients.Bobbit Worm
is an aquatic predatory polychaete worm dwelling at the ocean floor. This organism buries its long body into an ocean bed composed of gravel, mud, or corals, where it waits patiently for a stimulus to one of its five antennae, attacking when it senses prey. Armed with sharp teeth, it is known to attack with such speeds, its prey is sometimes sliced in half. Although the worm hunts for food, it is omnivorous.
Video source:Polychaete Sp.
Images credit: -see the watermark on the photo