These fish enjoy tranquil communities with non-aggressive tankmates. They wish to weave in and out in their plant issue, slowly but surely Discovering their aquatic environment. The Hallucigenia can be an elongated, worm-like creature with spiney oppendages all over its system. They went extinct all around 485 million years back, https://setbookmarks.com/story18637696/freshwater-fish-an-overview