I see all these comments on how to tame it lol. Easy. Shoot it in the face while walking backwards job done. None of this tame pen rubbish or hugging its legs. If you get one in the swamp your gonna want to lure it out of the swamp though
It's better to tame one you find at a beach/river than one in the swamp. The swamp has a lot of dangers that can make taming in there a nightmare (namely titanboa and other sarco, but leeches are not fun either)
You can find them near pretty much any body of water. Sometimes they are hard to see if they are in the water. They will follow you out of the water, since they are much slower on land try to lead them away from the water.
Sarcos are very slow on land so use a crossbow or better to tranq them so tame on land in and around the swamps or in rivers and ponds. DONT ESCAPE INTO THE WATER THEY HAVE A STRONG BITE AND ARE VERY FAST UNDERWATER!
These puppies are a semi-noob's best friend. Find them in swamps and near water holes. They really open up the map to you when you're a noob as they allow you to traverse waterways quite easily and quickly. All you need are some tranquil arrows and a decent distance and some raw meat. I've personally tamed 3 of them. They are also very useful for traveling up coasts and collecting lots of meat from dodos and scouting out those rounded rocks that give good metal. 10/10 my favorite dino.
To tame this guy you won't need very many tranq arrows compared to other creatures, you might even be able to slingshot one. You can either stand on a rock and shoot it, or stand back and shoot it. Either way, the sarco is quite slow on land, and it would be lucky to hit you. You won't need to make a trap but if you really want to you could probably make one out of pillars or doorframes. Once you have knocked it out, you won't need many narcotics once again compared to other creatures and any meat will do really but kibble, mutton, or prime meat are probably the best option. If you are new to taming, I would recommend feeding it about one narcotic every time it reaches the last letter in the word 'unconscious'on the purple bar at the top when you are taming it. When the taming bar at the bottom is full, you have tamed your own sarco!They are the fastest on land, so if you are having trouble knocking one out and you are being attacked, don't run into the water! Hope this helped!