On the 1901 Census, Blakeney
Nibley -

Evan Davies - who caught the Sturgeon .... photo on Blakeney Section

is listed as

Evan E DAVIES - 28 - Salmon Fisherman - age 28 - born Arlinginham with his wife Martha (nee WICKENDEN and my Grandad's sister)

Sturgeon - River Severn

http://www.glaucus.org.uk/Sturgen2.htm

Fish of the Severn

http://www.severnestuary.net/sep/estuary/fish.html