Hi, I have a couple of cross backs, (24" & 30"), in a three hundred gallon tank along with a silver (33"), a Jardine (26") and a few others as tank mates. Everyone gets along. The 2 cross backs have been doing the mating circles and vibrating together. I have noticed lately that when the large one vibrates there is an audible roar. Has anyone else experienced this? It sounds very neat.
Roaring Golden Cross backs
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