The Blue Whale: above 100K BTC
Whale: 10K-100K BTC
Orca: 1K-10K BTC
Dolphin (The common dolphin): 100-999 BTC
Popoto (The smallest dolphin): 10-100 BTC
Tuna 1-10 BTC
Herring 0.1-1 BTC
Minnow 1sat-0.1 btc

Post other suggestions, but have to be consistent (with whale).

It looks like there are only a total of 20-40K or so of Blue whales, whales, orcas and dolphins combined.
A very small group indeed.