Doberman gator

The Doberman Gator was a reptile-like animal that was cut out from Halo 2, but appeared in its Collector's Edition DVD.

Transcript
Robert McLees: "Hey!"

Marcus Lehto: "There you go, Rob."

Shi Kai Wang: "It's the... uh..."

Robert McLees: "Gator?..."

Shi Kai Wang: "Dog?..."

Robert McLees: "Doberman?..."

Marcus Lehto: "Doberman Gator?"

Trivia

 * It appears from the transcript above that Bungie originally did not know what to name the creature, and simply fused "Doberman" and "Gator" together to form "Doberman Gator".
 * Its anatomy slightly resembles that of the prehistoric Gorgonopsids which lived on Earth within the Permian. There are also similarities between it and Ambulocetus; an aquatic as well as terrestrial ancestor of Earth's Cetaceans which lived throughout the Eocene.