1. Elasmobranchiates are a group of cartilaginous fishes that includes sharks, rays, and skates.
鲨鱼纲动物是一类包括鲨鱼、鳐鱼和鳐的软骨鱼类群。

2. The elasmobranchiate's ability to detect electrical signals in the water makes it a highly efficient predator.
鲨鱼纲动物通过感应水中的电信号，成为高效的捕食者之一。