Sturgeon (Acipenseridae) is an ancient family of massive, cartilaginous fish easily recognized by their armor-like rows of bony scutes instead of traditional scales. Dating back over 200 million years to the Triassic period, they are among the oldest living fish species on Earth. Depending on the species, giant specimens can reach weights of 200 kg to over a ton.
Behavior and Feeding Habits
- Diet & Feeding Style: Feeds primarily on mollusks, worms, benthic crustaceans, and small fish. Cruising just above the riverbed or seabed, it uses four sensitive barbels and a highly sensory snout to locate prey before vacuuming it up with its protrusible mouth.
- Habitat & Migration: Inhabits deep sections of major rivers, estuaries, and seas. Many species are anadromous, spending most of their adult lives in marine environment before migrating hundreds of kilometers upstream into freshwater rivers to spawn.
- Lifespan & Activity: Most active in water temperatures between 10–20 °C. They are exceptionally long-lived creatures, with some individuals reaching ages over 100 years.
Conservation Status and Commercial Fishery Tactics
- Conservation & Legal Status: Wild sturgeon populations are critically endangered due to historical overfishing (for caviar) and dam construction. Consequently, wild sturgeon fishing is banned virtually everywhere worldwide. Legal angling is almost exclusively restricted to specially stocked commercial pay-lakes.
- Effective Baits & Tactics: At commercial fisheries, sturgeon respond aggressively to high-protein, smelly baits such as fishmeal pellets, large bunches of red worms or nightcrawlers, sweetcorn, and specialized sturgeon boilies. Heavy bottom/ledger rigs or feeder tactics are essential to keep the bait pinned down.
- Handling & Release: Sturgeon require extreme care due to their delicate skin between scutes and vulnerable gill structures. Always use large, well-padded unhooking mats, handle them only with wet hands, and never hold them by the gills or tail-lift heavy fish unsupported. Promptly revive and release them in deep water.
