Wrasse perform a vital cleaning function for other fish, by ridding their bodies of dead cells and parasites. Their biggest customers--literally and figuratively--are the massive manta rays.
From the Series: David Attenborough's Great Barrier Reef: Visitors http://bit.ly/2EAf5AT
Published 2018-01-12 · Watch on YouTube ↗ Availability and playback restrictions are controlled by the original channel.
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