The reading is also not the same as 捕まる. Sorry! It does have a similar reading to 取る though, which also has to do with grabbing things (like grabbing onto an idea, for example). You can use 取る as a jumping off point for remembering the reading of this word. You might also find it useful to think back to 捉える, which has to do with mentally "catching" or "grasping" things.
I was able to capture the moment the sun rose with my camera.
Catching mice is my cat’s specialty.