Oxide shark

The poisonous oxide shark is the deadliest predator in Cybertron's Rust Sea. Their bright green coloration inspired the Decepticon Devastator's alternate color scheme.

Fiction

Beast Wars: Uprising

At Megatron's urging, Overbite attempted to scan an oxide shark for a new alternate mode. The experimental beast mode process was only partially successful, leaving Overbite a malformed mixture of shark and submarine. Not All Megatrons