Brazilian? Snake-dolphin-rosewood chair  

They could certainly be Danish as well, based on the style, wood, execution, etc.  
They most remind me of some chairs that have only ever turned up with a Moreddi stamp on them (Moreddi was a Southern California Danish Modern Furniture retailer who private labeled Danish furniture, and in certain cases like these chairs, he seems to have had an exclusive distribution deal for them).  But, just to name a few, there are Wanscher, Hovmand Olsen, Vilhelm Wohlert designs that are not entirely dissimilar.  
However, I could easily imagine the unknown person who designed the chair for Moreddi might have designed these chairs.  
http://redmodernfurniture.com/2010/10/23/sculpted-teak-dining-chairs-by-...

I'd call it anthropomorphic moderne...
 
(...which reminded me of Carlo Mollino, which I then typed into Google, which then auto-suggested "Carlo Mollino Polaroids", which is nice to now know about...)

I'd call them an accident waiting to happen.  The wood looks like olive and the design looks Italian but mostly they just look impractical.

Thank you all very much for your feedback.
An accident waiting to happen. Well, that’s kind of what I like with these designs. They have a form of ambivalence expression. They look fragile and robust at the same time. The Danish chairs at least, have had more than half a century to prove their worth. If I had to compare the style to an animal, it wouldn’t really be a dolphin. It would be the cheetah. A gracious cat, but immensely powerful.
Enough with the metaphors.
I did a little digging regarding the Danish and Italian characteristics of the design, and found out that there might actually be a Danish-Italian connection (I know. It sounds like a drug-cartel)
As Leif mentions, a lot of Danish designers had similar design. The “grandfather” of Danish design, Kaare Klint, was very conservative in his designs, so I ruled him out as the source of inspiration.
Instead I found the “Great grandfather” of Danish design, Nicolai Abildgaard. Never heard of him before? Neither had I.
Nicolai Abildgaard was born in 1743 and died in1809. He was a man of many talents. Painter, sculptor,  professor at the Copenhagen Art Academy and furniture designer.
But where did Abildgaard get his inspiration? Well, as it was common for creative persons in those days, Abildgaard went to the center of the world. Rome, Italy, where he allegedly got the inspiration for his chair.
But where did the Italians get the inspiration? Well, they “stole” it from the greeks. This chair, called the Klismos chair, is of old greek design. As greek history has never really been my thing (poems with 16000 verses can bore anyone to death) I didn’t dig any deeper.
I know it’s a far stretched theory, but I didn’t have anything better to do this Sunday J
 
P.S. The first picture is not a chair.
P.P.S. Really liked Carlo Mollino’s photo gallery 😀