问鱼 is a utility application designed for the identification of common freshwater and marine species. It supports the recognition of over 500 aquatic organisms, including fish, shrimp, crabs, mollusks, cephalopods, algae, and sea urchins. This extensive coverage caters to everyday needs, educational purposes, and outdoor activities, making it a versatile tool for enthusiasts and professionals alike.

The app features a photo recognition capability that allows users to identify species by simply taking a picture. Additionally, it offers a platform for users to post and discuss their findings, fostering a community for both novices and experts. With its user-friendly interface and extensive database, 问鱼 provides valuable assistance for anyone interested in aquatic life.