Reptilian snake eel
The Reptilian snake eel ( Brachysomophis henshawi , also known as the Henshaw's snake eel , the Hawaiian crocodile eel , or the Crocodile snake eel ) is an eel in the family Ophichthidae ( worm/snake eels ) . 
<triplet> Ophichthidae <subj> eel <obj> parent taxon