Dictionary of Ichthyology  

Various structures - see numbered key below.

Lampanyctodes hectoris (Myctophidae) from Wikimedia Commons: http://commons.wikimedia.org/wiki/File:Lampanyctodes_hectoris_(Hector%27s_lanternfish)2.png
1 = operculum rear margin (gill cover), 2 = lateral line, 3 = dorsal fin, 4 = adipose fin, 5 = caudal peduncle, 6 = caudal fin, 7 = anal fin, 8 = photophores, 9 = pelvic fins (paired), 10 = pectoral fins (paired)

Canadian Museum of Nature
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