New Inhabitants

Taken at the new lake that was created last year, it is full of fish, some obviously this years hatch, others by their size from last year. What they are I don't know, green brown backs, black or dark brown tails. Then I spotted These 3,the third is upper left, in the ripples, cruising on the surface, sun bathing ! Seriously large! Also what they are, not sure. Acting like Carp, but no humpy back and only a short dorsal fin, any ideas people?
We escaped the violent storms last evening, lucky, as they laid waste Essen, Dortmund and Dusseldorf. 6 dead, scores injured, from uprooted trees etc.The downside of hot summer days.