Other organisms that can be seen while snorkeling include various forms of seaweed, jellyfish, sea turtles, and occasionally anything else which may be found in the ocean. Many of the organisms found in reef locations are vibrantly colored and very abundant, making for an engrossing experience.
Snorkeling requires no special training, only the ability to swim and to breathe through the snorkel. However, it is recommended that one get some instruction from a tour guide, dive shop, or equipment rental shop, any of which often can be found around popular snorkeling locations. Instruction will cover equipment usage, basic safety, what to look for, and what to look out for, including how not to damage fragile organisms such as coral. As with diving, it is always recommended that one not snorkel alone, but rather with a "buddy" or a tour guide.
The mask and snorkel are similar to those used in scuba diving, but since they are not subjected to the pressures of deep water, they can be more lightweight and comfortable. Swimfins used in snorkeling are usually longer than those used in diving.
Experienced snorkelers often start to investigate amateur free-diving, which should be preceded by at least some training from a dive instructor or experienced free-diver.