Yeah, everybody knows that you have to get bioelectric skin or anti-stangle armor/items etc etc

But what if you don't have access to such technology? What if you meet them in the second month and you don't rush genetics lab? Or you just don't want to equip every soldier with anti-strangle items because they then use their plasma pistols (that does much more damage than strangle)?



Examples:



So, like you see in the pictures, utilized cover is marked with a grey shield and you can't move your squadmates to occupied tiles.

But only when it's on the edge of the movement radius, you can see it like in the pictures above. If the stealthed seeker is in your field of movement it's much harder to see, but not impossible:


But to be sure that the tile is occupied you have to look at the line that your soldier will move


The above methods only work when the seeker is not flying.

Also the aim of grenades, rockets, etc will lock on the steathed seeker. (hard to show it with pictures)



On this example I threw a Flashbang (because the seekers were the only aliens left and I had no grenades anymore).
Since the flashbang does not damage them, they stay stealthed, but I knew their position at least. (Also I found out that both of them were on that position)



Now that you know where they are, you are ready to unstealth them before they try to strangle you. The best way is to damage them with stuff that can be freely aimed. Like Grenades, Collateral Damage etc.
You can unstealth Seekers with a Battle Scanner as well.


If you, by any means, can't guess the Seeker's position, there's a reliable tactic:

Keep your sqad close and put everybody on overwatch. Of course this only works guranteed if the Seekers are the only aliens active at the moment.

Also the seeker can't be cloaked forever. It takes about 4 turns until the seeker is forced to decloak.