When I got my ghost shrimp, they were smaller than 1 inch and only touched a fry if it was dead already. Now that some of them are over 1 inch, they will eat anything they can catch! I lost a lot of fry in a 10 gallon tank because the ghost shrimp would hide in the plants and snatch the fry when they got too close. I started with well over 100 sword fry and until I removed the ghost shrimp, their numbers dropped to around 50. I watched one of my largest ghost shrimp grab a fry and get pulled all around the tank until it was able to kill it and eat it.