11. The Spiny King Crab (Paralomis hirtella)
Described in 2017, the Spiny King Crab is a formidable resident of cold, deep-sea habitats. Its robust, armored carapace is covered in sharp spikes, offering both protection and a striking appearance. This well-defended crustacean is an excellent example of deep-sea adaptation, thriving in frigid, high-pressure environments. For more details about this spiky marvel, check out the coverage at Science Advances.