Sicklefin Lemon Shark
Negaprion acutidens
The sicklefin lemon shark (Negaprion acutidens) or sharptooth lemon shark is a species of requiem shark belonging to the family Carcharhinidae, widely distributed in the tropical waters of the Indo-Pacific. It is closely related to the better-known lemon shark (N. brevirostris) of the Americas; the two species are almost identical in appearance, both being stout-bodied sharks with broad heads, two dorsal fins of nearly equal size, and a plain yellow-tinged coloration. As its common name suggests, the sicklefin lemon shark differs from its American counterpart in having more falcate (sickle-shaped) fins. This large species grows up to 3.8 m (12 ft) long. It generally inhabits water less than 92 m (302 ft) deep in a variety of habitats, from mangrove estuaries to coral reefs. A slow-moving predator feeding mainly on bony fishes, the sicklefin lemon shark seldom travels long distances and many individuals can be found year-round at certain locations. Wikipedia →
30–40% of wildlife watchers report a Sicklefin Lemon Shark sighting in Ningaloo Marine Park, based on 19 days of visitor records from GBIF citizen-science data.
📅 Monthly Probability
🕐 When They’re Spotted
Sightings of Sicklefin Lemon Shark are recorded here, but fewer than 5 of them carry a time of day in GBIF — sighting probability uses whole days, so it is unaffected. The hourly pattern needs timestamps we don't have yet.
Global Distribution
Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.
where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is) · parks where it occurs — tap a pin for the sighting probability there
Parks Where Found
| # | Park | Country | Probability |
|---|---|---|---|
| 1 | Ningaloo Marine Park | 🇦🇺 Australia |
More parks will be added in future updates.
Quick answers
What are the chances of seeing a Sicklefin Lemon Shark in Ningaloo Marine Park?
About 31% of wildlife watchers report a Sicklefin Lemon Shark sighting in Ningaloo Marine Park, based on 19 days of visitor records from GBIF citizen-science data.
When is the best time to see Sicklefin Lemon Shark in Ningaloo Marine Park?
May has the highest sighting rate for Sicklefin Lemon Shark in Ningaloo Marine Park in our monthly data.