This is a very useful mount, especially in PvP. It has a special jump attack, which can grab players and hold them, or knock them of their mounts. It doesn't have much health though. It is fast on land and in the water, however increasing movement speed doesn't affect swimming speed.
These tames are good to defend your base leave several on the setting to attack anyone attacking your base because they can jump and dismount attacker I left some on the roof and they picked attackers off there flying tames and my turrets did the rest
To the person asking what's the use of this, there are quite a few creatures on mobile that have absolutely no uses at all... but not the kapro. Yes, as you say the sarco is better at everything apart from land travel, but did you forget kapro's stamina drain?. It might not seem much on low levels, but get a pair of lv 225+ imprinted kapros and you'll see. Given enough health and time, kapros can annihilate creatures that sarcos might have difficulties with. Also they're fun to play. And spam lunging in the ocean actually can make it as fast as a sarco.
These guys are perfect for traveling around the map, you can jump off a cliff and not die with their leap attack. I have a level 8 I believe and have explored very far from my base, came back with a crap load of electronics and stuff from tek parasaurs I killed. Very useful and would recommend. To tame you just need to keep your distance from it and avoid its leap attack as best as you can, they don't run that fast so just shoot it with some tranq arrows till it's knocked out. ^so people see
These guys are probably my favorite Tame for Scorched Earth because you can jump around the sand dunes like a made man and avoid anything Easily. Just level Stam and Health, and some weight and you can easily travel across the land with fun and ease before you get a flyer