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Dissection of a Sea Bass
Yee Jek Hui, Darryl (33) 1P1
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Parts of the Sea Bass
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The Sea Bass The sea bass is white at the bottom, turning to a dark bluish silver at the top. The head and fins are darker than the rest of the body.
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The Outside of a Sea Bass
Pectoral fin Pelvic fin Anal fin Caudal (tail) fin Caudal peduncle Soft dorsal fin Spiny dorsal fin Pectoral Fin: Locomotion and side to side movement
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The Outside of a Sea Bass
Pectoral fin Pelvic fin Anal fin Caudal (tail) fin Caudal peduncle Soft dorsal fin Spiny dorsal fin Pelvic Fin: Move the fish up and down
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The Outside of a Sea Bass
Dorsal Fin: Lends stability in swimming Pectoral fin Pelvic fin Anal fin Caudal (tail) fin Caudal peduncle Soft dorsal fin Spiny dorsal fin
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The Outside of a Sea Bass
Caudal Fin: To propel the fish forward Pectoral fin Pelvic fin Anal fin Caudal (tail) fin Caudal peduncle Soft dorsal fin Spiny dorsal fin
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The Outside of a Sea Bass
Pectoral fin Pelvic fin Anal fin Caudal (tail) fin Caudal peduncle Soft dorsal fin Spiny dorsal fin Anal Fin: Like the dorsal fin, it also lends stability in swimming
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Gills of a Fish Gills allow fishes to breathe underwater. They consist of gill filaments, gill arches and gill rakers.
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Gills of a Sea Bass Gill arches Gill rakers Gill filaments Gill Filaments: Large surface area to maximise the amount of oxygen absorbed.
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Gills of a Sea Bass Gill arches Gill rakers Gill filaments Gill Arches: Provide support for the gills and their associated blood vessels
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Gills of a Sea Bass Gill arches Gill rakers Gill filaments Gill Rakers: Bony, finger-like projections off the gill arch which function in filter-feeders in retaining food organisms
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Internal Anatomy of a Sea Bass
Heart: Circulates blood throughout the body. The blood transports waste products from the cells to the kidneys and liver for elimination. Heart Pyloric caeca
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Internal Anatomy of a Sea Bass
Heart Pyloric caeca Plyoric Caeca: Secrete enzymes that aid in digestion, may function to absorb digested food
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Internal Anatomy of a Sea Bass
Muscles: Provide movement and locomotion Swim bladder Muscles Vent
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Internal Anatomy of a Sea Bass
Vent: The site of waste elimination from the fish's body Swim bladder Muscles Vent
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Internal Anatomy of a Sea Bass
Swim Bladder: A hollow, gas-filled balance organ that allows a fish to conserve energy by maintaining neutral buoyancy in water. Swim bladder Muscles Vent
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Internal Anatomy of a Sea Bass
Kidney Stomach Liver Intestines Liver: It assists in digestion by secreting enzymes that break down fats, and also serves as a storage area for fats and carbohydrates. The liver also is important in the destruction of old blood cells and in maintaining proper blood chemistry, as well as playing a role in nitrogen (waste) excretion.
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Internal Anatomy of a Sea Bass
Kidney Stomach Liver Intestines Stomach & Intestines: Break down and digest food as well as absorb nutrients.
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Internal Anatomy of a Sea Bass
Kidney Stomach Liver Intestines Kidney: Filters liquid waste materials from the blood. It also regulates water and salt concentrations within the fish's body, allowing certain fish species to exist in freshwater or saltwater
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References Badman’s Tropical Fish. (2010). Fish Anatomy [on-line]. Available: Island Fishkeepers. (2008). Fish Anatomy [on-line]. Available: Australian Museum. (2010). Dissection of a Blue Mackerel, Scomber australasicus [on-line]. Available:
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Thank You
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