[quote=”helene” post=1285]:)(…)But that the paro is going for the eggs is obvious and maybe living in sparse environment makes precisely egg-steeling a very good supply of food ?(…)[/quote]
Very good remark, Helene! This indeed is the problem for blackwater fish: a rather sparse, oligotrophic, nearly sterile environment. Normal food not abundant, so that the fish must detect something unusual a concentrated nutritive substance: the eggs of shrimps.