I had detailed in an earlier post how my young jags had recently spawned in spite of the fact that are still very young. Because they had corralled all the other occupants of the tank to one end defending their fry I decided to move them about a month ago. I was only able to collect about six of the fry at the time and the others disappeared into my river rock substrate. I assumed they would be eaten by the tanks other occupants. At the same time I took the sponge cover off my canister filter intake. Well low and behold in the process of cleaning my canister I discovered 15 of the fry have been living in the canister since the move. They are smaller than their siblings but appear to be healthy. The filter is a modified Odyssea 700 that I have cut down the diameter of the sponge to provide more surface area. The 1/2 inch around the outside of the sponge was apparently enough swimming area to sustain the fry. I had a danio survive in a sump before, but would not have believed something could survive in a canister.