A Farewell-fish looks like a cute Mix out of a Blowfish and an Axolotl. they are usually 3 cm long. They are a very social species who help old sea animals who can't swim anymore by themselves to say one last Goodbye to their family (usually by cuddling) they only expand their body in order to keep themselves secured within an bigger animal while they stimulate the animals nerves. Over generations of fish they took on the Goodbye cuddling of the other species as an instinct. When they are exposed to not cuddling they die due to loneliness.