Orca, a Solana-based decentralized exchange (DEX), has raised $18 million in a Series A funding round led by Polychain, Placeholder, and Three Arrows Capital. The team intends to use this funding to continue developing their platform of the “most capital-efficient and user-friendly automated market maker (AMM) in the Solana ecosystem.” Orca aims to be the “go-to swap” platform for Solana.