Species: Urotrygon microphthalmum, Smalleye round ray, Smalleye Round Stingray, Smalleye roundray
Urotrygon microphthalmum Delsman, 1941
Smalleye round ray
Disc round, length about equal to width; snout long (length before eyes ~33% of disc width), with a pointed tip; eye small, < spiracle; pectorals continuous around head; tail slender, tapering, its length greater than disc length, with a large venomous spine; no dorsal fins; tail fin an elongate oval, upper lobe low (height < 1/6 its length) upper and lower lobes not confluent; upper surface of disc and tail almost without denticles, no central row of spines along back and top of tail.
Upper surface uniform grey brown, tail fin distinctly darker; lower surface white.
Reaches ~30 cm TL.
Lives on sand and mud bottoms; found in estuaries, in brackish to salt water.
Depth range: 10-25 m.
Venezuela to the Amazon river.
High Resolution Map Download
- Salinity
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- Brackish
- Marine
- Inshore/Offshore
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- Inshore
- Inshore Only
- Water Column Position
-
- Bottom
- Bottom only
- Habitat
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- Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
- Sand & gravel
- Mud
- Estuary
- Soft bottom only
- FishBase Habitat
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- Demersal
- Feeding Group
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- Carnivore
- Data
- Diet
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- Mobile benthic worms
- Mobile benthic gastropods/bivalves
- Data
- Mobile benthic crustacea (shrimps/crabs)
- Egg Type
-
- Data
- Live birth
- No pelagic phase
- No pelagic larva
- Global Endemism
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- West Atlantic Endemic
- Greater Caribbean non-endemic
- All species.
- Regional Endemism
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- Also in Brazil
- Continent only
- Continent
- Extends South of GC
- All species..
- GC non-endemic
- Residency
-
- Resident
- Climate Zone
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- Equatorial (0-10N, Costa Rica / Venezuela)
- IUCN Red List
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- Listed
- Least concern
- CITES
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- Not listed
- Length Max
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- 30
- Depth Range Min
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- 10
- Depth Range Max
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- 25
