Question: The Crocs River is a tributary of a river given what nickname?

Context paragraphs:
Waterfall Country (Wales): Waterfall Country (or sometimes Waterfalls Country) is the name given to an area around the head of the Vale of Neath in South Wales where an unusually large number of publicly accessible falls are to be found.  The area is loosely defined but generally includes the group of falls on the Nedd Fechan, Pyrddin, Hepste and Mellte rivers, all of which lie in the country between the villages of Pontneddfechan and Ystradfellte in the southern part of the Brecon Beacons National Park.  All of these falls lie within or on the boundary of the county of Brecknockshire, now part of the unitary authority of Powys.  A few miles further west are Henrhyd Falls on the Nant Llech, a tributary of the Tawe and to the southwest are Melin Court Falls on the Melin Court Brook, a tributary of the River Neath.  These, along with Aberdulais Falls on the Dulais, a further tributary of the Neath are also encompassed by the term 'Waterfall/s Country' by some writers.

Eerste River: The Eerste River, located in the Western Cape, South Africa, rises on Dwarsberg 60 km east of Cape Town at the head of Jonkershoek.  The Eerste River catchment covers the eastern part of the Cape Flats lying to the west of the Hottentots Holland Mountains and south of the Tygerberg where the Kuils River tributary rises east of Kanonkop.  The Eerste River is a short river; its length has been given as 40 km.  The major tributary, Kuils River, is approximately 30 km long to its point of confluence with the Eerste River.

Crocs River: The Crocs River (French: Rivière des Crocs) is a tributary of the Saint John River (Bay of Fundy), in Quebec and New Brunswick, in Canada.  The Crocs River flows in the southern part of the Gaspé Peninsula, across the following areas:

Wesachewan River: The Wesachewan River is a short river in the Hudson Bay drainage basin in Census Division No. 22 - Thompson-North Central, Northern Region, Manitoba, Canada.  It flows 2.5 km out of Vermilyea Lake via twin channels which combine at , then flows over the Namaykos Rapids, and empties into Wesachewan Bay on Gods Lake.  The main channel from Vermilyea Lake is the east channel, given as the primary source in the Infobox at right, which is straighter and 1.8 km shorter than its twin (1.25 km versus 3.05 km ), the west channel, given as the secondary source.  The length of the river given in the Infobox is the length using the shorter east channel.

Youghiogheny Scenic &amp; Wild River: The Youghiogheny Scenic & Wild River is a river given special protected status by the state of Maryland.  The wild and scenic portion of the Youghiogheny River is located in Western Garrett County, in Western Maryland.  The Yough drains an area comprising approximately 397 sqmi in Maryland, flowing through forests and farms.  It rises from the west side of Backbone Mountain in Preston County, West Virginia, near the state's border with Garrett County.

List of crossings of the Seine: This page is a list of present-day bridges over the River Seine and its channels, sorted by département, and then sorted from downstream to upstream.  After each bridge is listed the name of the communes which it links together, with the one on the right bank of the river given first.  The list does not include bridges over its tributaries.

Saint John River (Bay of Fundy): The Saint John River (French: "Fleuve Saint-Jean" ; Maliseet: "Wolastoq"( )) is a river, approximately 418 mi long, located principally in the Canadian province of New Brunswick, but also in and arising from the province of Quebec and the U.S. state of Maine.  It forms part of the Canada–United States border in two different places along its length.  The river drains an area of approximately 55000 km2 , of which slightly more than half is located in New Brunswick.  Along that portion of the Atlantic shoreline of North America that lies between the St. Lawrence River and the Mississippi River, the Saint John River is the second longest waterway; only the Susquehanna is longer.  It has been nicknamed the "Rhine of North America" for its scenery.  The river is regulated by hydro power dams located at Mactaquac, Beechwood, and Grand Falls, New Brunswick.

Ecorse River: The Ecorse River is an 18.8 mi river in southern Michigan.  Because of its small size, it is often identified as Ecorse Creek.  It flows through the Downriver section of Metro Detroit, and is a tributary of the Detroit River.  The early French settlers named it the "Rivière aux Écorces" ("bark river").  The river was given this name because of a custom, of the local Native American tribe, of wrapping its dead in birch or elm bark, and burying them at the mouth of the river.  The river has two branches, which meet at Council Point Park in the city of Lincoln Park, where Pontiac once held a council in 1763 before attacking Fort Detroit.

Cuarto River: The Cuarto River (Spanish, Río Cuarto, meaning "fourth river"; also known by the variant name Río Saladillo) is a river of Argentina which crosses the southern part of the Province of Córdoba, and merges with the Tercero River to form the Carcarañá River (a tributary of the Paraná River via the Coronda River).  The Cuarto River is also known as "Cochancharava", the name given to it by the Ranquel Indians.

White River (Wenatchee Lake): The White River is a river in the U.S. state of Washington.  It is the northern and larger of the two rivers that flow into the west end of Lake Wenatchee.  The smaller southern one is the Little Wenatchee River.  The White River is part of the Columbia River basin, being a tributary of the Wenatchee River, which empties into the Columbia River.  A large number of place names in the White River basin, including the river's name itself, were given by Albert H. Sylvester.

Supporting paragraphs: Crocs River Saint John River (Bay of Fundy)
Answer: "Rhine of North America"