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

full_context: Document 1: Connecticut River: The Connecticut River is the longest river in the New England region of the United States, flowing roughly southward for 406 mi through four U.S. states. It rises at the U.S. border with Quebec, Canada, and discharges at Long Island Sound. Its watershed encompasses five U.S. states and one Canadian province, 11260 sqmi via 148 tributaries, 38 of which are major rivers. It produces 70% of Long Island Sound's fresh water, discharging at 19600 cuft per second.
Document 2: Bay of Fundy: The Bay of Fundy (French: "Baie de Fundy" ) is a bay on the Atlantic coast of North America, on the northeast end of the Gulf of Maine between the Canadian provinces of New Brunswick and Nova Scotia, with a small portion touching the U.S. state of Maine.
Document 3: Saco River: The Saco River is a river in northeastern New Hampshire and southwestern Maine in the United States. It drains a rural area of 1703 sqmi of forests and farmlands west and southwest of Portland, emptying into the Atlantic Ocean at Saco Bay, 136 mi from its source. It supplies drinking water to roughly 250,000 people in thirty-five towns; and historically provided transportation and water power encouraging development of the cities of Biddeford and Saco and the towns of Fryeburg and Hiram. The name "Saco" comes from the Eastern Abenaki word "[sɑkohki]", meaning "land where the river comes out". "The Jesuit Relations", ethnographic documents from the 17th century, refer to the river as "Chouacoet".
Document 4: Susquehanna River: The Susquehanna River ( ; Lenape: Siskëwahane) is a major river located in the northeastern United States. At 464 mi long, it is the longest river on the East Coast of the United States that drains into the Atlantic Ocean, via the Chesapeake Bay. With its watershed, it is the 16th-largest river in the United States, and the longest river in the early 21st-century continental United States without commercial boat traffic.
Document 5: 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.
Document 6: Baboosic Brook: Baboosic Brook is a 12.7 mi stream located in southern New Hampshire in the United States. It is a tributary of the Souhegan River, which flows to the Merrimack River and ultimately to the Gulf of Maine.
Document 7: Big Salmon River (New Brunswick): The Big Salmon River is a small river in southern New Brunswick, Canada, that flows south into the Bay of Fundy. The river has its source to the southwest of Sussex, New Brunswick. The river flows into the Bay of Fundy near St. Martins, New Brunswick, and serves as the endpoint of the Fundy Trail.
Document 8: 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:
Document 9: Androscoggin River: The Androscoggin River is a river in the U.S. states of Maine and New Hampshire, in northern New England. It is 178 mi long and joins the Kennebec River at Merrymeeting Bay in Maine before its water empties into the Gulf of Maine on the Atlantic Ocean. Its drainage basin is 3530 sqmi in area. The name "Androscoggin" comes from the Eastern Abenaki term "/aləssíkɑntəkw/" or "/alsíkɑntəkw/", meaning "river of cliff rock shelters" (literally "thus-deep-dwelling-river"); or perhaps from Penobscot "/aləsstkɑtəkʷ/", meaning "river of rock shelters". The Anglicization of the Abenaki term is likely an analogical contamination with the colonial governor Edmund Andros.
Document 10: Mackenzie River: The Mackenzie River (Slavey language: Deh-Cho [tèh tʃʰò], "big river" or Inuvialuktun: Kuukpak [kuːkpɑk], "great river") is the largest and longest river system in Canada, and is exceeded only by the Mississippi River system in North America. It flows through a vast, isolated region of forest and tundra entirely within the country's Northwest Territories, although its many tributaries reach into four other Canadian provinces and territories. The river's mainstem runs 1738 km in a northerly direction to the Arctic Ocean, draining a vast area nearly the size of Indonesia. It is the largest river flowing into the Arctic from North America, and with its tributaries is one of the longest rivers in the world.
Document 11: Nashwaaksis, New Brunswick: Nashwaaksis is a neighbourhood and former village in the city of Fredericton, New Brunswick; it is located on the north bank of the Saint John River and at the mouth of the Nashwaaksis Stream, which should not be confused with the larger Nashwaak River nearby. The word "Nashwaaksis" comes from the Maliseet language, with the "-sis" appendage meaning "little Nashwaak".
Document 12: Mersey River (Nova Scotia): The Mersey River, formerly known as Rivière Rossignol by the Acadians, is a river in Nova Scotia, Canada. It is named after the River Mersey in Liverpool, England. The river proper flows from the eastern end of Eleven Mile Lake in Annapolis County southward to Kejimkujik Lake in Kejimkujik National Park, then through Lake Rossignol to empty into the Atlantic Ocean at the town of Liverpool, Nova Scotia. The true source of the river however is as far northwest as Sandy Bottom Lake (Annapolis County) or Tuskopeake Brook (Annapolis County) on the northern tributary.
Document 13: Chisasibi: Chisasibi (Cree: "ᒋᓵᓰᐲ/Cisâsîpî" meaning Great River) is a village on the eastern shore of James Bay, in the Eeyou Istchee territory in northern Quebec, Canada. It is situated on the south shore of La Grande River (the Grand River), less than 10 km from the river's mouth. Chisasibi is one of nine Cree villages in the region, and is a member of the Grand Council of the Crees of Quebec. The territory surrounding Chisasibi is part of the Municipality of Baie-James, of which parts are jointly managed with the Cree Regional Authority.
Document 14: Mississippi River: The Mississippi River is the chief river of the second-largest drainage system on the North American continent, second only to the Hudson Bay drainage system. Flowing entirely in the United States (although its drainage basin reaches into Canada), it rises in northern Minnesota and meanders slowly southwards for 2320 mi to the Mississippi River Delta at the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains all or parts of 31 U.S. states and 2 Canadian provinces between the Rocky and Appalachian Mountains. The Mississippi ranks as the fourth-longest and fifteenth-largest river in the world by discharge. The river either borders or passes through the states of Minnesota, Wisconsin, Iowa, Illinois, Missouri, Kentucky, Tennessee, Arkansas, Mississippi, and Louisiana.
Document 15: St. Croix Stream: St. Croix Stream is an 18.8 mi river in Aroostook County, Maine. From the outflow of St. Croix Lake ( ) in St. Croix Township (Township 8, Range 4, WELS), the river runs northwest to the Aroostook River in Masardis. Via the Aroostook River, St. Croix Stream is part of the Saint John River watershed.
ground_truth: "Rhine of North America"