Fish endemic to only a single lake! (19 species added)

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The following species were added on 23 July 2023:

• Stone sculpin (Paracottus knerii)
• Lake Biwa gudgeon (Sarcocheilichthys biwaensis)
• Lake sturgeon (Acipenser fulvescens)
• Japanese mystery snail (Cipangopaludina japonica)
• Yodo dwarf gudgeon (Biwia yodoensis)
• Moore's lamprologus (Variabilichromis moorii)
• Aobara blue belly goby (Rhinogobius sp. 'BB')
• Western hotoke loach (Lefua torrentis)
• Biwa-higai gudgeon (Sarcocheilichthys variegatus microoculus)
• Lake Biwa hydrozoan (Pachycordyle kubotai)
• Siberian taimen (Hucho taimen)
• Willow gudgeon (Gnathopogon caerulescens)
• Biwa trout (Oncorhynchus rhodurus)
• Baikal sturgeon (Acipenser baerii 'baicalensis')
• Oumi spined loach (Cobitis minamorii oumiensis)
• Threadfin cichlid (Petrochromis trewavasae)
• Giant Lake Biwa catfish (Silurus biwaensis)
• Isaza goby (Gymnogobius isaza)
• Big red sculpin (Procottus major)

Only a few pictures exist of the big red sculpin (Procottus major) you see here. I have provided my shot to Wikipedia.

The Siberian taimen (Hucho taimen) is the largest salmonid in the world and very rare in aquariums.

The Aobara blue belly goby (Rhinogobius sp. 'BB') is not even described yet and is already considered Critically Endangered!