Fish Crossword

specialized sensory system running the length of both sides of a fish's body
openings in the shark's skin which allow water to enter and flow through the gills
jointed/cartilaginous or bony structures behind the jaws in fish
a hard plate that is attached to each side of the head of a fish that covers gills and is open at the rear
a method of reproduction in fish
a membranous winglike structure that helps fish and other aquatic animals propel, balance, and guide their body
fin that extends from the tail
when a fish alternates between relaxing and flexing its muscles to move through water
one of the two fins located behind the gills of a fish
in fish, one of the paired fins positioned in the ventral, posterior portion of the body
a species of fish that tie themselves in knots to escape predators
organ that produces gametes
fish that live in an environment with less than 0.05% of salt concentration.
enamel tipped structures on shark skin surface
seminal fluid in male fish
muscle chambers that pump blood out of the heart
a jawless class of fish
a sac filled with gas that controls buoyancy of fish
receives information from the visual systems  
fish that live in an environment with more than 0.05% of salt concentration.