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MOUTH MOUTH MOUTH • Related to food source • Superior (upturned) – surface feeders Tarpon MOUTH • Related to food source • Superior (upturned) – surface feeders • Terminal (end/ normal) - midwater Tuna MOUTH • Related to food source • Superior (upturned) – surface feeders • Terminal (end/ normal) – midwater – Wide: predators – Narrow: ovmnivores MOUTH • • • • Related to food source Superior (upturned) – surface feeders Terminal (end/ normal) – mid-water Inferior (underneath) – bottom feeders Sucker fish MOUTH • • • • Related to food source Superior (upturned) – surface feeders Terminal (end/ normal) – mid-water Inferior (underneath) – bottom feeders – Suckers: rasping algae, plants or mud – Whiskers: feel and taste in muddy waters FINS • • • • Movement Nest building Spawing Tactile organs CAUDAL FIN MOUTH CAUDAL FIN MOUTH CAUDAL FINS • • • • Propulsion Forked: regular, fast swimmers Rounded: Quick action Elongated: used for attracting mates CAUDAL FIN MOUTH ANAL FIN CAUDAL FIN ANAL FIN MOUTH ANAL FIN • Stabilization • Propulsion CAUDAL FIN MOUTH ANAL FIN PELVIC FINS CAUDAL FIN ANAL FIN PELVIC FINS MOUTH PELVIC FIN • Paired • Stabilization • Long: tactile organ CAUDAL FIN MOUTH ANAL FIN PELVIC FINS PECTORAL FINS CAUDAL FIN ANAL FIN PELVIC FINS PECTORAL FINS MOUTH PECTORAL FINS • Maneuvering • Some bottom dwellers: props or to walk DORSAL FINS CAUDAL FIN MOUTH ANAL FIN PELVIC FINS CAUDAL FIN PECTORAL FINS DORSAL FINS ANAL FIN PELVIC FINS PECTORAL FINS MOUTH DORSAL FINS • Balance • May have spines for protection • 2nd made of fatty tissue – function unknown DORSAL FINS CAUDAL FIN MOUTH ANAL FIN LATERAL LINE PELVIC FINS CAUDAL FIN DORSAL FINS ANAL FIN PELVIC FINS PECTORAL FINS PECTORAL FINS LATERAL LINE MOUTH LATERAL LINE • Detects vibrations • Senses water pressure