Danaplus is a crustacean-type Hyper-Zoanoid developed at Cronos' Cloud Gate facility. This Zoanoid is covered with armoured chitin from which long spines will extend. Danaplus can extend these spines at will and they can vibrate at high frequencies, allowing them to pierce and cut almost anything much like the Guyver's arm blades.
Danaplus' abilities proved to be woefully inadequate against Sho Fukamachi when he attacked Cloud Gate with his Gigantic armour.