Chapter 3 Handout- External fish structures (Autosaved) -...

BIOL 3705 Chapter 3: External Fish Structures Name: Zoelle Reinke
Instructions- Complete the following handout as thoroughly as possible using your textbook and Moodle
Powerpoint files to assist you. Type your answers into this document, print, and turn in by the due date.
Handouts are to be completed by each student independently.
Section 1: Vocabulary
Canine- Large conical teeth frequently located at the corners of the mouth. An example would be
snappers.
Molariform- Blunt and rounded grinding teeth. Also, pavement like crushing teeth. Rays have teeth like
this.
Cardiform- Very small teeth that are located densely together. They would feel like sandpaper to a
human. This helps with holding down struggling prey. An example would be a largemouth bass.
Scutes- Modified scales. These scales are the ventral row of scales and they are sharp and for protection.
Sturgeon have five rows of these.
Annulus- The spacing between circuli will decrease in a slower growing season and it leaves behind a
dark band on the scale called an annulus. This typically is equal to one year’s worth of growth in the fish.