Plizio Visual Lab

Sturgeons

Plizio editorial teamUpdated: Jun 2026Data Sources

Animal habitat

Weather…

Sturgeons are among the oldest living vertebrates on Earth, remaining virtually unchanged since the Cretaceous period. The Lower Danube in Romania is one of the last places globally where wild populations still migrate and spawn, including species like the Beluga, Starry Sturgeon, and Sterlet. The Beluga is particularly remarkable, capable of living over 100 years and reaching weights exceeding 1,000 kg. These migratory fish spend most of their lives in the Black Sea, traveling hundreds of kilometers up the Danube to reach their spawning grounds. However, they are critically endangered due to overfishing for their eggs (caviar) and habitat fragmentation caused by dams like the Iron Gates. Today, Romania maintains a strict permanent ban on commercial sturgeon fishing to prevent their extinction. Protecting their remaining habitats and ensuring safe migration paths is vital for the survival of these 'living fossils' of the underwater world.

Location: Tulcea, Romania
Nearby: Sulina (8 km)

Best time to visit & climate

The most pleasant time to visit is Jun, Aug, Sep.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg °C	1	2	6	11	18	22	25	25	20	14	8	3
Rain mm	43	31	32	31	38	46	36	25	35	46	38	44

📋 Practical info

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Best season

The best time to observe sturgeons in the Danube Delta is from April to June, when fish migrate up from the Black Sea to spawn. In autumn they migrate back to the sea, so summer months are also good.

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Best time of day

Sturgeons typically migrate at night, so early morning and late evening are best for sightings. During the day they stay in deeper waters and are hard to observe.

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Etiquette

Sturgeons are strictly protected; catching them is prohibited. Keep distance from spawning sites and do not disturb the fish during reproduction.

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What to bring

Binoculars are useful for spotting sturgeons at the water surface when they leap. A waterproof camera or underwater housing may be helpful but is not necessary.

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Getting there

The best places to observe sturgeons are the canals and river branches of the Danube Delta, accessible by boat tours from Tulcea. Guided tours with local fishermen often provide insights into migration routes.

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What to expect

Sturgeons are not always visible at the surface - patience and quiet observation from the boat are important. Watch for leaping fish or wave movements that indicate activity.

Geography

Coordinates

45.10000, 29.60000

Facts

Beluga sturgeons (Huso huso) can reach ages of over 100 years.
Sturgeons have existed for approximately 200 million years.
The largest Beluga ever recorded weighed 1,577 kg (3,477 lbs).
The Iron Gates dams blocked off 800 km of their historical migration route.
Romania implemented a 10-year ban in 2006, now extended indefinitely.
Sturgeons are cartilaginous fish, meaning their skeletons are made of cartilage.