Discocephali
plural noun
Dis·co·ceph·a·li
ˌdiskōˈsefəˌlī
: a small order of spiny-finned fishes comprising the remoras and having the dorsal fin modified into a flat sucking disk on top of the head used for adhering to the bodies of other fishes (as sharks and swordfishes)
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Merriam-Webster unabridged
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