Urolophus halleri
Silhouette: Lankester Edwin Ray (vectorized by T. Michael Keesey) · PhyloPic
In 3 days ~80% in a week >90%
The round stingray (Urobatis halleri) or Haller's round ray and Little round stingray is a species of round ray, family Urotrygonidae, found in the coastal waters of the tropical and subtropical parts of the northeastern Pacific Ocean. It is a small, common ray that feeds mostly on benthic invertebrates. On the beaches of southern California, it is responsible for numerous injuries to bathers, who are stung when they accidentally step on the fish. The wound caused by its venomous spine can be painful, but is non-fatal.
The species name, halleri, is after the young son of Major Granville O. Haller of the United States Army, who was stung on the foot while wading along the shores of San Diego Bay. This species is endemic to the eastern North Pacific Ocean, from Humboldt Bay in northern California south to Panama. It is most common around southern California and the Baja Peninsula. They inhabit tropical to warm-temperate waters close to shore, usually less than 15 m deep, although they have been reported to a depth of at least 91 m. This species favors soft-bottomed habitats such as mud or sand, often with abundant eelgrass, which they use... Wikipedia →
Recording0:20
United States · 2025
© Adam Jay · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Channel Islands National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | SeaWorld Orlando | 🇺🇸 United States | |
| 2 | Turtle Back Zoo | 🇺🇸 United States | |
| 3 | Downtown Aquarium, Denver | 🇺🇸 United States | |
| 4 | Gran Acuario de Mazatlán "Mar de Cortés" | 🇲🇽 Mexico | |
| 5 | Monterey Bay Aquarium | 🇺🇸 United States | |
| 6 | Mote SEA | 🇺🇸 United States | |
| 7 | Birch Aquarium | 🇺🇸 United States | |
| 8 | Aquarium of the Bay | 🇺🇸 United States | |
| 9 | Tennessee Aquarium | 🇺🇸 United States | |
| 10 | Shark Reef at Mandalay Bay | 🇺🇸 United States | |
| 11 | Idaho Aquarium | 🇺🇸 United States | |
| 12 | Layton Aquarium & Wildlife | 🇺🇸 United States | |
| 13 | Marine Kingdom | 🇮🇳 India | |
| 14 | Sea Life at Mall of America | 🇺🇸 United States | |
| 15 | SEA LIFE Minnesota Aquarium | 🇺🇸 United States | |
| 16 | Ty Warner Sea Center | 🇺🇸 United States |
Likely
About 40% of wildlife watchers report a Haller's Round Ray sighting in Channel Islands National Park on a given day, based on 28 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 3rd most-seen of the 7 sharks and rays we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
June
In that month about 90% of wildlife watchers report a Haller's Round Ray in Channel Islands National Park on a given day, against about 10% in April and October–November, the lowest months. That is one of Channel Islands National Park's driest months, with almost no rain against 60 mm in January. December to February have too few records to rate.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Haller's Round Ray sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Channel Islands National Park, in our data
Channel Islands National Park is the only park on Wallace's Line with enough records to rate Haller's Round Ray sightings: about 40% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Haller's Round Ray is recorded against all the sharks and rays logged in Channel Islands National Park (28 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
