So everyone knows the current Steem "class" system based on how much Steem Power you have. It goes like this:
1,000,000,000 Vests - Whale
100,000,000 Vests - Orca
10,000,000 Vests, - Dolphin
100,000 Vests - Minnow
Less than that - Redfish
Well with Hard Fork 20, we will have a new class of functional Steem accounts, that start with literally 0 Steem Power. I think it is a significant step, to move from zero to non-zero, so we should have a new term for this new class of Steemian.
Shellfish are often among the smallest of sea creatures. I think the idea of shells fits with an account which is waiting to be filled with Steem Power. What do you think?