"Black Ocean" is a true dark pool, where institutional clients, exchanges, funds, OTC merchants can get liquidity and execution of their orders without touching the market price of an asset. On the other hand, professional traders and liquidity providers execute healthy order flow. The key challenges on the crypto market are a tricky way to find a deep liquidity while smallest spread, trading rebates encouraged by order flow and an opportunity to build an own product without any limitations. The "Black Ocean" is the answer.