It’s not a Rhino, which I also never saw. It was a special construction for amphibious landing based on a vehicle often seen on the western front.
Hello everybody!
I´m new here 
The vehicle shown by Sergej seems to be a T87 GMC " Esch Device ", an amphibian Gun Motor Carriage, based on the construction of M18 Hellcat.
A little info, Russian site translated by Google
WELCOME TO THE SITE, WOJ. i BELIEVE YOU WILL ENJOY THE BANTER AND THE PHOTOGRAPHY. TEXAG57
Woj, which city or town do you live in or near? I am in College Station, Texas. The Republic of Texas
Thanks texag57 
I´am waiting for the attestation of my answer by Sergej. And than…I would address my tank_question 
Welcome woj!
Excuse me for my delay. Your answer is correct!
Please proceed with our armor quiz:)
No problem Sergej, it´s the holliday time after all
Upps… I can´t post any images…
…so sorry guys, but I have to spam a little bit…
…because I need at least 5 post, to be able to address my question…
… and now I hope the great moment is coming
so name this vehicle:
It looks similar to soviet tank destroyer SU-45 [СУ-45]
- 45 mm AT gun on modified T38M chassis.
nope, but it´s indeed the soviet one and the chassis is well recognised!
Sometimes it’s called СУ-37 or even СУ-37/45 but imho it is a mistake.
As far as remember СУ-37 was on T-37 chassis.
The stage is yours Damazy
SU-37 is correct…according to my source at least
All right.
Try this:
M3- Halftrack
My first thought is Saracen Armoured Personnel Carrier.
The vehicle shares a common chassis with both the Alvis Stalwart Military Amphibious Truck and the Saladin Armoured Car. What distinguishes the Saracen from the other two vehicles on the same chassis is that the Saracen has the engine forward, whereas the Stalwart has it slightly mid-chassis (essentially 60% of the engine block is between the leading and middle pair of wheels, 40% is aft of the middle wheels), and the Saladin has the engine at the rear of the vehicle chassis.
All of the chassis were 6x6, meaning all wheels were driven. While the Stalwart was amphibious, the Saladin and Saracen, though moderately capable in water, were not, as far as I know, officially classed as amphibious, but rather as having more than sufficient ‘fordability’ : ie. They could cross fast-flowing streams and small rivers. That said, I have over the years heard tales of both Saracen and Saladin in amphibious roles.
Of minor interest is that the turret of the Saracen mounts a .303 machine-gun, originally a Browning, later an FN. The same turret was also employed on the Ferret 4x4 Armoured scoutcar, often used in the same role as it’s Dingo predecessor.
Of esoteric interest is that the Saladin turret mounted a 76.2mm cannon, basically scaled-down from that carried by some models of the Sherman tank, and that Australia built a Fire-Support version of the M113 APC which used the Saladin turret, and employed this hybrid APC in the Vietnam conflict, where it is said to have served successfully.
As a child, the three vehicles with a common chassis interested me greatly, and I still have the 1960’s “Matchbox Toys”, diecasts by Lesney of the UK.
Kind and Respectful Regards, Uyraell.
My second guess would be BRM 152 armoured truck/personnel carrier, as used by the Soviet army during the latter half of WW2 and into the mid 1960’s.
Respectful Regards, Uyraell.
Unfortunately none of these guesses was correct.
Here you’ve got two more photos of this mysterious vehicle:
