Your Fish Scientists give fish and other life forms scientific names. The names are usually in Latin. This is because people form all over the world speak many different languages, and Latin is a common language among all scientists.
Scientists also like to group fish into smaller and smaller groups.
This way they can show relationships between different fish. All animals, including fish, are in the Animalia kingdom. Scientists then broke down all the animals into groups called phylum and subphylum. All fish can be found in the Chordata phylum and Vertebrata subphylum. This is because all fish have a backbone and that's what those words mean.