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Osmoregulation - the process by which fish maintain equilibrium of body salts relative to their environment
Overfishing - overfishing occurs when the number of fish taken from an ecosystem and population is greater than the population’s ability to reproduce and replenish the number in the population


Pectoral Fin - fins on the side of the body used for turning, backing up, stopping and also balancing
Pelvic Fin - the paired fin behind the pectoral fin on the sides of the body also used for turning, backing up, stopping and balancing
Pickling - the process of preserving food by anaerobic fermentation in brine a solution of salt in water
PIT Tag - PIT (passive integrated transponder) tags are an inject able, internal microchip that allows unique identification of a marked fish; the tag is passive, meaning that it does not put forth the unique number until it is requested by a scanner
Pollution - the introduction of contaminants into an environment that causes instability, disorder, harm or discomfort to the ecosystem
Polychaete - a large and diverse group of segmented marine worms
Primitive - very old; having only slightly evolved from an earlier primeval or ancestral type
Prehistoric - belonging to or existing in times before recorded history
Prey - animal hunted or caught for food
Protrusible - capable of being thrust outward; sturgeon have a protrusible mouth which they use to suck up prey items like a vacuum


Real-Time Data - data that is available to users as soon as it is received by the system
Roe - fish eggs; sturgeon eggs or roe are turned into caviar