By Sarah Saunders from 3D Print.com
The remora has a specially adapted dorsal fin called a suction disc that it uses to cling to larger sea creatures, like whales, dolphins, and sharks. The disc is made up of a soft, circular lip and linear rows of tissue called lamellae, which have small, needle-like spinules – using muscles around the disc, the remora can actually change its shape to hang on to its host in order to feed off of its feces and dead skin. The spinules add friction, so the fish has pretty good suction gripping power.
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