In crypto slang, a fish is a trader or holder with a small position, often someone new to the market. The term belongs to an informal scale of sea creatures used to describe how much of a coin, usually bitcoin, a wallet holds: shrimp and crabs at the bottom, then fish, octopuses and dolphins, with sharks and the largest holders, whales, at the top. The boundaries are not fixed and vary between analytics firms. In poker and older trading slang, "fish" also suggests an unskilled player who is likely to lose money to more experienced ones, and that sense carries over: fish are often described as reacting late to price moves, buying near peaks and selling in panic. On-chain analysts track how coins move between these groups using blockchain analytics.
Last updated 13 Nov 2026