Not very exotic, but I love my Orange Spotted Goby. He doesn't sift sand but he's got a symbiotic relationship with my bulldozer pistol shrimp and they are fascinating to watch.
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-Mark
29 Gal Bowfront w/24" LED Lights. DIY HOB Sump (5.4 Gal) MP40. Orange Spotted Watchman Goby, 2 Clownfish and a few hermits.
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