No. The aquatic kind of spiracle (such as you'd find on rays and skates) could be located only on cartilaginous fish, or the most primitive of the bony fish. The loosest definition of spiracles seems to include a respiratory opening such as the blowhole in whales; lobsters do have ventral openings to the gills but these are anatomically dissimilar to those. (Also since lobsters are aquatic, they do not possess spiracles of the type you'd find on insects.)
No. Insects have spiracles and some kinds of Spiders have spiracles. Millipedes and centipedes have spiracles. All those are generally land-dwelling animals.
Crayfish are crustaceans like crabs are, and crustaceans evolved their means of breathing underwater; they developed gills, not the breathing tubes called tracheae. Tracheae take in air at the spiracles.
Crayfish are aquatic crustaceans and have gills.
Crayfish do not breathe air they breathe water
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Grasshoppers have spiracles that help them breath whereas crayfish breath through gills.
Function of spiracles for sharks
it have spiracles so it can breathe. like a boss
spiracles are the breathing apparatus of insects.
The insect uses its spiracles to breathe through instead of their mouth.
All insects have spiracles. This is how they breathe because they do not have lungs like vertebrates do!
Butterflies have nine pairs of spiracles. These are pores open to the air and tracheae which carry air through the body of an insect. Spiracles are located on the abdomen and thorax.
Spiracles are used by grasshoppers for respiration. Air is taken in throught the spiracles and filtered by hairs in tubes called tracheae. The trachea branch out through the body eventually ending in Tracheoles where the oxygen is distributed to cells and carbon dioxide is taken out and back throught the trachea and exits the body through the spiracles
Crayfish
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yes