fish stuck

So I have a green chromis stuck in my overflow and no matter what i cant net him because hes so fast, anyone know how to get him out??

I have had the issue of my fish getting stuck in my filter. First it was my small ocellaris clownfish, so I attached a piece of fine mesh over the filter (I have a AIO filter from fiji cube) but yesterday I noticed my diamond goby was nowhere to be found. I looked in the filter and he was...

My yellow watchman goby is stuck in the first bay of my sump and I don't know how to get him out! There is no access to the bay aside from the hole for the plumbing to drop water in. I saw how he got there and fixed that problem, but I cant get him to swim up to the top and into the next bay...