Another unusual physical feature of Cobelodus are the  long, flexible cartilagenous 'tentacles' sprouting from its pectoral fins. Their purpose is unknown. Type species, C. aculeatus is known from shoreline lagoon.
Cobelodus exhibits an unusual physical characteristic: long, flexible cartilaginous 'tentacles' that extend from its pectoral fins. The purpose of these structures remains unclear. The type species, C. aculeatus, is known to inhabit shoreline lagoons.