Anatomical Features: Fins Flashcards
What is the function of the caudal fin?
- propulsion
What is the function of paired-medial fins?
- control/direction of movement
- pitch/roll/yaw
What is the function of fin rays?
- structural support
What fin rays are found in sharks? what are their features?
- ceratotrichia
- stiff, unbranched
What fin rays are found in bony fish? what are their features?
- lepidotrichia
- flexible, segmented, branched
What are the major features of pectoral fins in rover predators and bottom rovers?
- ventral/below midline
What is the major function of pectoral fins in rover predators and bottom rovers?
- stability/steering
What are the major features of pectoral fins in deep bodied and fast swimming predator rovers
- long and pointy
What are the major features of pectoral fins in slower swimming predator rovers?
- more rounded
What are the major features of pectoral fins in deep-bodied fish?
- high on sides
What are the major functions of pectoral fins in deep bodied fish?
- maneuverability, picking-up food
What fish have exaggerated/large pectoral fins?
- flying/gliding fish
- lionfish for display
What do sharks use their rigid pectoral fins for?
- stabilization and diving
What is the ancestral condition of pelvic fins? what is the function?
- ventral/posterior
- assist in steering and breaking
What fish have ancestral pelvic fins?
- rover predators
- bottom rovers (sharks, sturgeon)
What adaptations have occurred in pelvic fins of deep bodied fish? what is the major advantage of this?
- more anterior/below pectoral fins
- maneuverability