The water jet is a means of propulsion.
Squids move through the water by jet propulsion. They draw water into their mantle cavity and then forcefully eject it out through a siphon, creating a powerful jet of water that propels them forward. By controlling the direction and force of the water jet, squids can move in different directions and at varying speeds.
they jet through the water at really high speed
This is a very good question. Squids move through the water at high speeds using a jet propulsion-like organ called a "siphon". What the siphon does is take in water and thrust it out, much like a jet engine. The end result is the jet-like streamline of a squid.
No, squids will day if they are out of water for too long.
Sounds like you are talking about octopus and squids which are not mammals.
The colossal squid moves by using its fins and jet propulsion. It can swim forward quickly by expelling water through a funnel-like structure to propel itself. The fins help with steering and stabilization as it moves through the water.
Octopuses and squids can also move by using a form of jet propulsion. Water is drawn into the mantle cavity and then forced out through a tube, propelling the cephalopods backwards from danger. In addition, squids and octopuses produce a dark-colored ink when the are frightened. As this ink is released into the water, it helps to hide the mollusks/squids/octopuses and confuse its predators
Squids are aquatic animals that use gills for respiration. They extract oxygen from water passing over their gills and release carbon dioxide. Squids also have a siphon or funnel through which they can expel water, allowing them to jet-propel through the water.
They live in water.
With their tentacles.
They live in water.
They let their water out into the ocean.