Taxonomic hierarchy: domain, kingdom, phylum, class, order, family, genus, species
In evolutionary biology, taxonomy is a hierarchical organism classification system that groups together those with shared characteristics. Starting with the broadest categories of how you could classify an organism, it is then possible to narrow down what species or subspecies it is! The process can be described as kind of similar to finding a specific library book. Starting with looking for the correct genre, finding the specific topic or category of interest within that genre, narrowing down a selection of books that have the information you need, and eventually having it all come down to one book.
Game to test out taxonomy process!
Sea Cucumber Sources
Taxonomic classification sources