I have a pair of engineer gobies that are about a year old, approximately 10" long. They have done very well until now. Since yesterday, one of the engineers has not returned to its tunnel, and has spent time just laying on the sand (occasionally takes a swim around the tank and up to the surface). There have not been problems between fish in the aquarium in the past, but now the yellow-bellied blue hippo tang is picking on it. The engineer could go into the rocks or into one of its tunnels to protect itself, but it just sits there and takes it. Any suggestions?
Thanks.
---Marshall
Thanks.
---Marshall
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