Fish Notes - Marine Biology

Phylum Chordata

________ is characterized by having a notochord, gill (pharyngeal) slits, and a dorsal nerve cord at some point in their life cycle.

Manta rays

________ feed on plankton and small fish by filtering.

Vision

What is a key part in maintaining orientation within group? Answer with a single words or term.

Intestines

What are straight in carnivores and coiled in others? Answer with a single words or term.

Pectoral fins

________ have become "wings "that stretch forward over the gills and are fused to the sides of the head.

Class Osteichthyes

________ are jawed fish with bone skeletons.

Scientists

________ theorize that during the Cambrian period, the first of three gill arches on a jawless fish evolved into the first jaws.

Fins

________: fan- like structures for moving, balance, and steering.

Water conservation

________ is then possible through small amounts of concentrated urine.

Group

________ breaks apart during feeding or attacks by predators.

Fish

________ have a swim bladder /gas bladder-- it is an organ inside their body that they fill up with gas to control their buoyancy.

Respiratory exchange

What is through skin? Answer with a single words or term.

Grazers

________ eat primarily seaweed.

Sharks

What are carnivorous? Answer with a single words or term.

Plankton feeders

What are the most abundant? Answer with a single words or term.

Pyloric Caeca

________: Slender tubes that secrete digestive enzymes.

Scales

Fins: fan- like structures for moving, balance, and steering. ________: protects the body, most are overlapping plates of bones.

Classes

________ are jawless, cartilaginous, and bony fish.