Something good is that Costa Rica offers body-temperature water with few humans and abundant marine life. If you are looking for fine opportunities to see massive schools of fish, as well as larger marine animals such as turtles, sharks, dolphins and whales, then jump right in. There are decent places sites that can be explored on a discovery basis. There are opportunities for good snorkelling in Costa Rica, though great locations are few and far between. Due to this, most Costa Rica snorkelling tours are run in combination with other activities such as hiking, kayaking or a catamaran cruise.