| choose the feature that relates to your
fish |
first dorsal fin modified as a suction disk on top of the
head |
 dorsal fin preceded
by one or more rays or spines unconnected by
membranes |
small rayless adipose fin behind dorsal
fin |
dorsal and caudal
fins united, body tapering to a point |
single dorsal fin of short
to medium length |
single long
dorsal fin without deep notch, not connected to caudal
fin |
single elongate
dorsal fin with deep notch or two dorsal fins not separated
by a space |
two dorsal fins
separated by a distinct space |
