The Fish commonly found in Hobsons Conduit
Three Spined Stickleback

Very common all along the conduit from Nine wells to the conduit head. Great shoals of them can be seen all through the year. Max length 50 mm. Midge larvae and chironomids are the main food item. Breeding starts in April when the brightly coloured males become very territorial.
Ten spined Stickleback

Less common than the three spined, this fish can have between eight and twelve spines and more secretive in nature. This species is occasionally seen along most of the conduit. It is mostly up to 50mm long, but can occasionally grow larger.
Millers Thumb
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Also known as the Bullhead is found mostly in the middle to upper reaches of the conduit. The colouration can vary greatly and matches the surroundings. The maximum size is 60 to 80 mm. Its eats a wide range of food including insects and other invertebrates.
Minnow

A resident of the conduit that is far less common than the three spined stickleback. Can form large shoals. Max length 80 mm.
Stone Loach

The largest of the fish commonly found in the conduit. Max length 140 mm. Bottom feeding fish which eats a wide diet of invertebrate prey.