What is a juvenile shark?

Just what the Word implies, an immature animal of the Squalian ( Shark) tribe. there is no generic Word, like Puppy or Kitten, so we will say a juvenile shark. Byt he way both Squalid ( run down, ugly circumstances) and Shirk- meaning avioiding work or responsibility- derive from the alleged Squalid habits of the Shark ( Latin, Squalus) and are negative terms, as is, of course, the Loan-Shark.