blenny
noun
blen·ny ˈble-nē 
plural blennies
: any of numerous usually small and elongated marine fishes (especially families Blenniidae and Clinidae) including scaled and scaleless forms
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One of a group of numerous and diverse species, blennies are mostly small, marine fish found from tropical to cold seas. Blennies are slim, ranging from moderately elongated, to very long and eel-like. Their habitats include rocky pools, sandy beaches, reefs, and beds of kelp. Many live in shallow water, but some live in depths of about 1,500 ft (450 m). Some are mainly herbivores; others are partial or complete carnivores. They are generally unobtrusive and of little economic importance.
Example Sentences
Recent Examples on the Web Having a specialized diet allowed certain species of blenny to adapt to environmental changes or continue to evolve to further the species, the researchers noted. 
Fox News, 17 June 2020 Those puny fishes—gobies, blennies, cardinalfishes, and others—are mostly less than two inches long. Jennifer Hayes, National Geographic, 23 May 2019 The fish that are likely to thrive in the oceans of the future—small, adaptable species such as gobies and blennies—are, simply, not fish people like to eat. Lizzie Wade, WIRED, 1 Sep. 2015 Stone crabs, arrow crabs and various blennies live hidden amidst the anemones. Ben Raines | Braines@al.com, AL.com, 5 July 2017
Fox News, 17 June 2020 Those puny fishes—gobies, blennies, cardinalfishes, and others—are mostly less than two inches long. Jennifer Hayes, National Geographic, 23 May 2019 The fish that are likely to thrive in the oceans of the future—small, adaptable species such as gobies and blennies—are, simply, not fish people like to eat. Lizzie Wade, WIRED, 1 Sep. 2015 Stone crabs, arrow crabs and various blennies live hidden amidst the anemones. Ben Raines | Braines@al.com, AL.com, 5 July 2017 Word History
Etymology
Latin blennius, a sea fish, from Greek blennos
First Known Use
1769, in the meaning defined above