Scuba Season

Atlantic spotted dolphin

Stenella frontalis

Sighting evidence at Princesa Sperm Whale Corridor, Azores — Faial and Pico

Atlantic spotted dolphin

Photo: scientik · © all rights reserved

Atlantic spotted dolphins are a constant companion species in the Faial-Pico channel from spring through autumn, often bowriding dive boats and interacting with in-water swimmers. Juveniles are unspotted at birth and develop their characteristic speckled pattern progressively — the degree of spotting is a reliable age indicator. These dolphins are among the most studied cetaceans in the world due to long-running research programs in the Bahamas and Azores tracking individual animals across decades.

Evidence at this site

79 records within 25 km

Confidence: high

Seasonality

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How is this calculated?

Sighting evidence is compiled from iNaturalist observation records within a set proximity radius, filtered for quality-grade observations. “Last confirmed” is the date of the most recent research-grade record. Record count covers a rolling 24-month window. Confidence reflects record count, recency, and consistency of seasonal signal.

Also seen at other sites