Sharks Sharks cannot make any vocal sounds as they don't have vocal cords. They do communicate via body language – such as swimming in zigzags, shaking their heads
TurtlesWhile turtles don't have vocal cords, they are still capable of producing a wide range of noises and sounds.
SnailsSnails do not have any vocal cords.
SlothsDespite the absence of vocal cords, the sloths can emit sounds such as guttural grunts and “hissing” sounds by diverting air loudly through the nostrils.
OctopusThey do not have vocal cords, they communicate with body gestures.
Giraffe While giraffes do have a larynx, or voice box, their small lung capacity and narrow trachea make it difficult to produce enough airflow to vibrate their vocal cords.
Jellyfish Many simple sea creatures do not have vocal cords, such as fish, jelly fish, and starfish.