prefacing this with tank details: 54 Litre rectangle Ammonia: 0 Nitrite: 0 Nitrate: 5 Planted Tank with Driftwood. 6 Cardinal Tetra, 4 Male Guppy. 1 Nerite snail, 3 Blue Jelly Shrimp. 26C in temp. Tank 2: 65 Litre [10 is taken up by the internal sump setup] Ammonia: 0 Nitrite: 0 Nitrate: 5 Planted Tank with Driftwood. 3 Marbled Hatchets [trying to get hold of more!]. 1 Halfmoon male betta. Hi all! It looks like my guppies have decided they have a vendetta against the biggest one in there. All of the others are about half of his size, but I can't say that his tail or fins are particularly any bigger or more showy than theirs. If anything he's lacking a bit of colour at the end of his. I noticed while taking a look in my main tank that they just will not leave him alone, constantly chasing him all over the tank. One in particular, my orange one keeps going for the same spot at the base/body of his tail, NOT the fins. The others seem quite happy to have a go at his fins. To me, it looks like at the base of his tail on his body both ontop of him and under him has turned white - perhaps like he has lost scales in these areas due to biting. He is dark blue in this area, so it's very noticeable. At first I thought it was mainly the small orange one going for him and so moved him into a breeder box into another tank [we'll get back to that tank shortly] but it had no effect, the others still picked on him. Even tried moving decorations as a distraction, but no. the orange one is by far the worst aggressor, the others just picked on him occasionally. This poor guy is not at all interested in fighting back, I rarely if ever see him retaliate. I'm worried they're going to stress him out to the point of death, so currently he's in my betta's tank. Fortunately Vic seems to be a very docile little guy, he has no interest at all in the guppy or the marbled hatchets but I will be watching closely. At worst, I can put the guppy in a breeder box but he was desperate to get out and I think it was stressing him out even more. His breathing is a lot calmer now. So I'm just looking for advice! I don't really know what to do with this guy. I don't want to get rid of him. I could try getting more guppies - I'd be interested in more I suppose. The only other thing that was going to go in there was some zebra danios if I can find the kind I like. [Or, if appropriate, they can join Vic and the hatchets]. I'm just not sure why they've taken to really having a huge go at him or if there's anything I can do to resolve it. Thanks all!