LOCATION Costa Mesa Senior Center 695 W. 19th St. Costa Mesa , CA 92627 Guests are always welcome! Upcoming Events The next meeting is April 4th. Stay tuned for more details! Our speakers cover an extensive range of topics to enlighten and promote best fish keeping practices. Providing education and camaraderie of fresh water aquatic life. Always something to find at our monthly auctions of member fish stock and related items! California’s Organization of Aquatic Show Tropicals (COAST) is an all-volunteer, 501©(7) not-for-profit association registered with the state of California.