I am noticing that many players are having the same problem of finding the watch and monkey. Where..

They are in the fishing net, it’ll come randomly instead of seaweed.

If you have your fishing net upgraded. Not only seaweed drops, also rocks with gold in it. Tap on the rocks to get up to the end of it, to get a Watch or Monkey. Then save those to merge them until you get the Watch or Monkey you want.