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 features an unusual physical trait: long, flexible cartilaginous 'tentacles' that extend from its pectoral fins. The purpose of these structures is not known. The type species, C. aculeatus, can be found in shoreline lagoons.