Iron Siever

The iron siever split from its ancestor the rusty muckraker and has spread to the beaches of barlowe and ovi salt lake, where it fills the niche of an active benthic filter-feeder. A mutation has caused the addition of two more sets of jaws, which are now used for swimming. The original set of jaws is used solely for making the clicking noises used for echolocation. Because of this, the jaws are much smaller and located on the front of the siever’s carapace. The clicking sound is made by the quick compression of water into a small pocket in its carapace. The pocket is almost complimentary in shape to the jaw, but it allows the water to get out through a small groove in the proximal end of the pocket. The water shoots out of this groove, creating cavitation bubbles, making a quick snapping sound. When using echolocation, the siever will alternate snapping its left and right snappers.

The siever perpetually pulsates its oral tentacles to capture microorganisms. It will occasionally swim into the substrate, kicking up whatever organisms might be found in the sand. When it does this it uses its anterior swimming jaws to move around the soil.