A small, transparent or translucent freshwater fish, popular in aquariums, or one of several marine fish with glass-like appearance or large glassy eyes.
From 'glass' + 'fish'; named for their transparent or glass-like bodies and large glassy eyes.
Glassfish are so transparent you can see their organs and skeletons—they're basically living glass windows into what fish biology looks like, which is why scientists love studying them!
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