Nature Field Guide
Panamanian Pearl Oyster
- Spanish name
- Concha perla
- Scientific name
- Pinctada mazatlanica
What Do Pico & Tati Think?
A pearl oyster is a two-part shell animal from Pacific coastal waters.
Species overview
About the Panamanian Pearl Oyster
This pearl oyster is a bivalve, meaning its shell has two valves. Costa Rican records include Bahía Culebra and Bahía Panamá. A loose valve is only one half of the original shell.
Explorer activity: Using photographs, label the hinge, outside and inside of one valve. Explain why a single shell half is not a complete living animal.
Your discovery notes: Record the date, place and habitat, then add a sketch or photograph. If you cannot confirm the species, label it “unidentified shell” and keep your observations.
Identification
Key Features of the Panamanian Pearl Oyster
Two hinged valves in a living animal.
Compare the hinge and outline with a pearl-oyster reference.
An empty valve may show a pearly interior; do not open a live oyster.
Habitat & range
Shallow coastal waters, including rocky marine habitat.
Local observations
Pacific Costa Rica: Bahía Culebra and Bahía Panamá records. This supports regional inclusion, not a confirmed Tamarindo Beach sighting.
When to observe
Tides and conditions affect visibility. Let an adult or local guide choose a safe observation time; this card does not promise a seasonal sighting.
Conservation & care
Observe and photograph shells where they are. Leave living animals, occupied shells and empty shells in place. Do not pry animals from rocks, dig in mangroves or put fingers into shell openings. Explore with an adult or guide, follow site rules and stay clear of surf and slippery rocks.
Observation activity
Using photographs, label the hinge, outside and inside of one valve. Explain why a single shell half is not a complete living animal.