Shark repellents are important tools for anyone venturing into shark-infested waters. However, the term "shark repellent" is quite common, and you may want to use other synonyms to avoid repetition in your writing. Some alternative phrases include "shark deterrent," which implies something that discourages sharks from coming close. "Anti-shark spray" is another option to describe solutions to discourage these creatures. Another option could be "marine repellent," which includes repellents that work on other types of fish and sea creatures in addition to sharks. Finally, "oceanic deterrence" is a term that encompasses various types of repellents and deterrents used to keep away from predators.