Gasterosteus Aculeatus is a scientific name for the three-spined stickleback, a small fish found in many freshwater and marine environments. This species of fish is known for its sharp, spiny armor that covers its body, providing excellent protection against predators. If you're looking for synonyms for Gasterosteus Aculeatus, you might start with "stickleback" or "three-spined stickleback." Other synonyms include "spiny stickleback," "thornback," and "prickly stickleback." These terms all refer to the same species of fish, which is known for its unique physical characteristics and its ability to thrive in a variety of aquatic environments.