Hawaiian Goby (Sicyopterus stimpsoni)

From USFWS Fisheries:

Fish can climb rocks too? The Hawaiian Goby, more commonly called the O’oppu nopil, is one of three native goby species that has the ability to ascend waterfalls by fusing their pelvic into a suction cup to anchor themselves upon rocks. Hawaiian Gobies, because of their unique vertical migrations ascending waterfalls were celebrated on World Migration Day 2016. More: http://bit.ly/2ixv4oK#SaturdayScience Photo/USFWS 




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