At mid-semester test, I got a Biology exam about Animalia kingdom, I was stuck at a question about Echinodermata (Starfish family). And I remember which species belong to which Class and one that I don't remember what is this thing, was Crinozoa, I was like "come on! please give me a hint" then I remembered Cradily, that happen both are start with "C", and Cradily also based on Crinozoa. Thanks Cradily!