Answer:
What screams when put in a pot of boiling water?
It can be white or blue or black, Humped or have a horn. And when it talks it sings its menuets, as it's travelling the depths.
These animals hang out in the mist.
It has 8 arms and lots of ink but can't write a word.
To you, rude would I never be, Though I flag my tongue for all to see.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?