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SALMONID RICKSETTSIA SEPTICAEMIA (RICKETTSIAL SALMON SYNDROME
SEDIMENTATION POND (SETTLING BASIN)
HEAD CANALS
Definition
Tubular sensory organs that run beneath the surface of the head or in grooves in many fishes. The main branches are the lateral canal, which is a forward continuation of the lateral line on the body, and a temporal canal that extends from the lateral canal towards the dorsal midline across the occipital region of the head. A preopercular- mandibular canal runs in the cheek bone and continues out toward the tip of the lower jaw; supraorbital and suborbital canals are variable. These are useful for the identification of certain species.
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