Picture is worth a thousand words; Video clips, priceless

I am just amazed by how a short video clip can illustrate the fascinating aspects about fishes.
The oceanfootage.com web site has a large collection of short videoclips on fishes which I highly recommend as you continue your studies of fishes. Supplement your lab work sketching new fishes and their distinguishing characteristics with taking close up photographs of key characteristics or whole fish photos. Then explore the life of the fish more deeply by finding photos and video that illustrate the role of the fish in the ecosystem.

I suggest you browse the short video on the Picasso triggerfish -- which illustrates the feeding and cloud of sand flowing out the gill openings.