Tiger loaches as in the Syncrossus species? They are indeed very aggressive and do not suit well in community setups at all with the exception of feisty barbs and other aggressive loach species. None are compatible with invertebrates.Thank you for this forum and your replies, everyone. I now have 3 loaches (2 tiger, 1 yo-yo), if anyone wants them, because I did not do adequate research! I thought they would be good discus-friendly bottom feeders, but one tiger loach is nipping at my sweet snails! I prefer the snails to the loaches, so if no one here wants some near-free loaches, they're going back to Pet World! Aaagh I'm such a flake!