One of the new mounts datamined in Patch 10.0.5 is the Cerulean Marsh Hopper, a new crab mount! The Cerulean Marsh Hopper will be obtained through the new The Trading Post. The Cerulean Marsh Hopper is a bright blue recolor of the frog mounts added in Battle for Azeroth such as the Green Marsh Hopper. This should be a relatively easy way to obtain the BFA frog mount model, as the ones released in that expansion cost a whopping each!
NEW Cerulean Marsh Hopper