Sorry to bump an old thread but I can't find any information on this. I just bought a shrimp the other day just called 'caribbean shrimp'. It's only been in my tank for a day and it's a 20g. My ywg is not paired with it yet and although it is early, these stories are scaring me especially since my goby is so tiny even compared to the shrimp.Yes, that's what I bought. A Green Caribbean pistol. Never accepted the goby.
Did yours look like this? and how did you catch it?