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Hi - I am considering a purchase of a Fairy Dot-Dash Flasher Wrasse. My LFS told me that in order for them to flash, I need another flasher wrasse. Is that true, or just an upsell?[/QUOTE
I don’t know that particular species. However, my McCoskers flasher flashed when he was the only wrasse. He flashes more frequently now that I have other wrasses.
A flasher wrasse will flash even if kept by itself, but it will flash more with other flasher wrasses present. Just make sure that any others are a different species.