Freshwater fish are fish that spend some or all of their live in water with a salinity level lower than .05%. Freshwater fish, due to the segmented nature of ponds, lakes, and rivers, are subject to speciation similar to species on islands. Even though only .3% of global water is freshwater, only about 15,000 different species of freshwater fish exist. Freshwater fish make popular pets, while other, larger species, such as salmon, trout, and carp are hunted for food. Freshwater fish have undergone adaptations to survive in freshwater; such as, gills that diffuse dissolved gasses and keep salts inside, scales that reduce water diffusion, and kidneys that reclaim salt from body fluids before excretion.

What is the largest freshwater fish in the world?

The largest freshwater fish in the world is the beluga sturgeon. The beluga sturgeon can reach a length of 24 feet (7 m) and a weight of 3,500 lbs (1,500 kg). This freshwater fish has been declared endangered since 2004, due to the demand for its eggs that are sold as caviar.

What do freshwater fish eat?

The diet of a freshwater fish depends on its habitat, species, as well as the ecosystem they live in. Freshwater fish can carry a carnivore, herbivore, or omnivore diet depending on their species. Carnivore freshwater fish consume other live fish, insects, larvae, and crustaceans. Herbivore freshwater fish eat plants, algae, as well as other vegetable matter.

Why can’t freshwater fish live in saltwater?

Freshwater fish can’t live in saltwater because it is too salty for them. The water inside their bodies flows out and as a result they die from dehydration. Fish need to osmoregulate or maintain the right amount of water in the bodies. Freshwater fish can only survive in accordance to how much salinity their body can handle.

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7”-9” | 17.8-22.9 cm
5’-6.5’ | 1.5-2 m
50-125 lb | 22.7-56.7 kg
20-50 years
Alligator Gar
22.900
200.000
56.700
50.00
72000
3D
Alligator Gar
8.5”-11.5” | 21.6-29.2 cm
5’-7’ | 1.52-2.13 m
60-200 lb | 27-91 kg
20-30 years
American Paddlefish
29.200
213.000
91.000
30.00
21000
3D
American Paddlefish
5”-6.75” | 12.7-17.1 cm
19”-24” | 48-61 cm
3-8 lb | 1.4-3.6 kg
6-10 years
American Shad
17.100
61.000
3.600
10.00
4500
3D
American Shad
2.5”-4” | 6.4-10.2 cm
12”-20” | 30.5-51 cm
2-4 lb | .9-1.8 kg
5-10 years
Arctic Grayling
10.200
51.000
1.800
10.00
3500
3D
Arctic Grayling
6.5”-9” | 16.5-22.9 cm
28”-40” | 71-102 cm
8-12 lb | 3.6-5.4 kg
5-13 years
Atlantic Salmon
22.900
102.000
5.400
13.00
13000
3D
Atlantic Salmon
1.5”-3.75” | 3.8-9.5 cm
4”-11” | 10-28 cm
3-4 lb | 1.4-1.8 kg
7-15 years
Black Crappie
9.500
28.000
1.800
15.00
6800
3D
Black Crappie
3”-6.5” | 7.6-16.5 cm
7”-16” | 18-41 cm
1-2.6 lb | .5-1.2 kg
5-10 years
Bluegill
16.500
41.000
1.200
10.00
33000
3D
Bluegill
2”-5.5” | 5-14 cm
10”-26” | 25-66 cm
.6-6.6 lb | .3-3 kg
5-15 years
Brook Trout
14.000
66.000
3.000
15.00
24000
3D
Brook Trout
5”-7” | 12.7-17.8 cm
24”-34” | 61-86 cm
3-9 lb | 1.4-4 kg
5-12 years
Bull Trout
17.800
86.000
4.000
12.00
5600
3D
Bull Trout
2”-4.5” | 5-11.4 cm
12”-24” | 30.5-61 cm
2-7 lb | .9-3.2 kg
15-25 years
Channel Catfish
11.400
61.000
3.200
25.00
19000
3D
Channel Catfish
5.5”-8.5” | 14-21.6 cm
24”-36” | 61-91 cm
30-40 lb | 13.6-18.1 kg
5-9 years
Chinook Salmon
21.600
91.000
18.100
9.00
17000
3D
Chinook Salmon
6”-10” | 15.2-25.4 cm
24”-40” | 61-102 cm
8-22 lb | 3.6-10 kg
3-7 years
Chum Salmon
25.400
102.000
10.000
7.00
6200
3D
Chum Salmon
4.5”-7.5” | 11.4-19 cm
18”-30” | 46-76 cm
8-35 lb | 3.6-16 kg
2-4 years
Coho Salmon
19.000
76.000
16.000
4.00
20000
3D
Coho Salmon
5.5”-11” | 14-28 cm
36”-72” | 91-183 cm
30-100 lb | 13.6-45.4 kg
55-150 years
Lake Sturgeon
28.000
183.000
45.400
150.00
7300
3D
Lake Sturgeon
4”-7” | 10.2-17.8 cm
20”-36” | 51-91 cm
4-22 lb | 1.8-10 kg
10-40 years
Lake Trout
17.800
91.000
10.000
40.00
14000
3D
Lake Trout
4”-8” | 10.2-20.3 cm
15”-30” | 38-76 cm
1.8-30 lb | .8-13.6 kg
15-20 years
Largemouth Bass
20.300
76.000
13.600
20.00
42000
3D
Largemouth Bass
3.5”-6.5” | 8.9-16.5 cm
28”-48” | 71-122 cm
10-40 lb | 4.5-18.1 kg
15-30 years
Muskellunge
16.500
122.000
18.100
30.00
10000
3D
Muskellunge
2.25”-3.75” | 5.7-9.5 cm
16”-26” | 41-66 cm
1.5-4 lb | .7-1.8 kg
10-25 years
Northern Pike
9.500
66.000
1.800
25.00
30000
3D
Northern Pike
4.5”-7” | 11.4-17.8 cm
20”-30” | 51-76 cm
2-8 lb | .9-3.6 kg
4-11 years
Rainbow Trout
17.800
76.000
3.600
11.00
19000
3D
Rainbow Trout
2.5”-6.5” | 6.4-16.5 cm
10”-27” | 25-69 cm
.8-12 lb | .4-5.4 kg
5-15 years
Smallmouth Bass
16.500
69.000
5.400
15.00
26000
3D
Smallmouth Bass
5.5”-15.5” | 14-39.4 cm
20”-55” | 51-140 cm
5-70 lb | 2.3-32 kg
20-30 years
Striped Bass
39.400
140.000
32.000
30.00
32000
3D
Striped Bass
Walleye
58000
4.5”-8.5” | 11.4-21.6 cm
22”-42” | 56-107 cm
3-7 lb | 1.4-3.2 kg
15-25 years
Walleye
21.600
107.000
3.200
25.00
58000
3D
Walleye
2.5”-5.5” | 6.4-14 cm
10”-18” | 25-46 cm
2-5 lb | .9-2.3 kg
4-9 years
White Bass
14.000
46.000
2.300
9.00
15000
3D
White Bass
1”-2.5” | 2.5-6.4 cm
4”-10” | 10-25 cm
.5-1 lb | .2-.5 kg
7-13 years
Yellow Perch
6.400
25.000
0.500
13.00
12000
3D
Yellow Perch
American Shad

The American Shad (Alosa sapidissima) is a fish loved for three primary reasons. First, for its roe. Second for its meat rich in omega-3 fatty acid and third, for recreational purposes like sport fishing and the annual shad festival. The fish inhabits the coastal waters of North America preferring to spend most of its time in the Atlantic ocean and only migrate to freshwater when it wants to spawn. The American Shad is also called Atlantic shad, herring jacks, or Potomac shad. They are classified under the family Clupeidae and recognized by their distinct keel on the belly, moderately compressed bodies, and sharp saw-like scales.

American Shad have a total length between 19”-24” (48-61 cm), body height of 5”-6.75” (12.7-17.1 cm), and an overall weight in the range of 3-8 lb (1.4-3.6 kg). The typical lifespan of the American Shad is 6-10 years.

Scaled collection of drawings of American Shad in front and side poses
The American Shad (Alosa sapidissima) is a fish loved for three primary reasons. First, for its roe. Second for its meat rich in omega-3 fatty acid and third, for recreational purposes like sport fishing and the annual shad festival. The fish inhabits the coastal waters of North America.

American Shad have a total length between 19”-24” (48-61 cm), body height of 5”-6.75” (12.7-17.1 cm), and an overall weight in the range of 3-8 lb (1.4-3.6 kg). The typical lifespan of the American Shad is 6-10 years.

Scaled collection of drawings of American Shad in front and side poses
American Shad
Height:
5”-6.75” | 12.7-17.1 cm
Width:
Length:
19”-24” | 48-61 cm
Depth:
Weight:
3-8 lb | 1.4-3.6 kg
Area:
Scientific Name
Alosa sapidissima
Lifespan
6-10 years

Drawings include:

American Shad side elevation, front

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Bluegill

The Bluegill (Lepomis macrochirus) is a panfish, usually very bold, expressing no fear for humans. It is used as a baitfish besides also playing an important role in keeping the population of insects and crustacean low. Male Bluegills make the spawning bed and are more colorful than females.

The fish is also called brim, sunny, bream, and copper nose and belong to the sunfish family Centrarchidae, inhabiting streams, lakes, ponds, and rivers of North America. These omnivorous freshwater fish show very distinctive coloring and condensed bodies with faces and gills covered in deep blue and purple color and bellies in yellow or orange color.

Bluegills have a total length between 7”-16” (18-41 cm), body height of 3”-6.5” (7.6-16.5 cm), and an overall weight in the range of 1-2.6 lb (.5-1.2 kg). The typical lifespan of the Bluegill is 5-10 years.

Scaled collection of drawings of Bluegill in front and side poses with length measurement
The Bluegill (Lepomis macrochirus) is a panfish, usually very bold, expressing no fear for humans. It is used as a baitfish besides also playing an important role in keeping the population of insects and crustacean low. Male Bluegills make the spawning bed and are more colorful than females.

Bluegills have a total length between 7”-16” (18-41 cm), body height of 3”-6.5” (7.6-16.5 cm), and an overall weight in the range of 1-2.6 lb (.5-1.2 kg). The typical lifespan of the Bluegill is 5-10 years.

Scaled collection of drawings of Bluegill in front and side poses with length measurement
Bluegill
Height:
3”-6.5” | 7.6-16.5 cm
Width:
Length:
7”-16” | 18-41 cm
Depth:
Weight:
1-2.6 lb | .5-1.2 kg
Area:
Scientific Name
Lepomis macrochirus
Lifespan
5-10 years

Drawings include:

Bluegill side elevation, front

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Atlantic Salmon
Measured comparison illustration of the size of a Atlantic Salmon to a typical person

The Atlantic Salmon (Salmo salar) is a very delicate fish, hence its presence is a good indicator of the health of an ecosystem. The fish is widespread in the Northern Atlantic oceans and surrounding rivers. Its life stage is full of unique names such as smolt, parr, fry, and alevin: depending on whether it is in the freshwater or saltwater phase.

Atlantic Salmon are members of the family Salmonidae migrating between the sea (feeding grounds) and rivers (breeding grounds). Adults are identified by their predominantly black spot above the lateral line plus highly developed teeth. Besides, they change appearance when they enter freshwater or salty water.

Atlantic Salmons have a total length between 28”-40” (71-102 cm), body height of 6.5”-9” (16.5-22.9 cm), and an overall weight in the range of 8-12 lb (3.6-5.4 kg). The typical lifespan of the Atlantic Salmon is 5-13 years.

Set of scaled elevation drawings of the Atlantic Salmon viewed from the front and side
The Atlantic Salmon (Salmo salar) is a very delicate fish, hence its presence is a good indicator of the health of an ecosystem. The fish is widespread in the Northern Atlantic oceans and surrounding rivers. Its life stage is full of unique names such as smolt, parr, fry, and alevin.

Atlantic Salmons have a total length between 28”-40” (71-102 cm), body height of 6.5”-9” (16.5-22.9 cm), and an overall weight in the range of 8-12 lb (3.6-5.4 kg). The typical lifespan of the Atlantic Salmon is 5-13 years.

Set of scaled elevation drawings of the Atlantic Salmon viewed from the front and side
Atlantic Salmon
Height:
6.5”-9” | 16.5-22.9 cm
Width:
Length:
28”-40” | 71-102 cm
Depth:
Weight:
8-12 lb | 3.6-5.4 kg
Area:
Scientific Name
Salmo salar
Lifespan
5-13 years

Drawings include:

Atlantic Salmon side elevation, front

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Walleye
Measured comparison illustration of the size of a Walleye to a typical person

The Walleye (Sander vitreus) are members of the family Percidae native to most freshwater bodies in Canada and the Northern United States. Its name comes from its eyes that are pointed upwards. These freshwater fish are nocturnal and prefer to travel in shallow waters.

Walleyes are one of the most commonly stocked game fish, distinguished by a big mouth with sharp teeth, long and thin bodies with gold or olive color patterns, and a white underside. They also have five or more color bands crossed on their backs. Besides, the Walleye has two dorsal fins (one spiny and another soft-rayed) and migrate to tributary streams to breed.

Walleyes have a total length between 22”-42” (56-107 cm), body height of 4.5”-8.5” (11.4-21.6 cm), and an overall weight in the range of 3-7 lb (1.4-3.2 kg). The typical lifespan of the Walleye is 15-25 years.

Scaled collection of drawings of Walleye in front and side poses
The Walleye (Sander vitreus) are members of the family Percidae native to most freshwater bodies in Canada and the Northern United States. Its name comes from its eyes that are pointed upwards. These freshwater fish are nocturnal and prefer to travel in shallow waters.

Walleyes have a total length between 22”-42” (56-107 cm), body height of 4.5”-8.5” (11.4-21.6 cm), and an overall weight in the range of 3-7 lb (1.4-3.2 kg). The typical lifespan of the Walleye is 15-25 years.

Scaled collection of drawings of Walleye in front and side poses
Walleye
Height:
4.5”-8.5” | 11.4-21.6 cm
Width:
Length:
22”-42” | 56-107 cm
Depth:
Weight:
3-7 lb | 1.4-3.2 kg
Area:
Scientific Name
Sander vitreus
Lifespan
15-25 years

Drawings include:

Walleye side elevation, front

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Rainbow Trout | Steelhead Trout

Rainbow Trout (Oncorhynchus mykiss), or Steelhead Trout, receive their name from their silver color and round head. They are members of the family Salmonidae. They are native to North America and the Pacific ocean in Asia’s tributaries, with the Rainbow trout living in freshwater while the Steelhead Trout grow in the ocean but migrate to freshwater to breed.

The Steelhead Trout is larger than its counterpart. However, both species develop differently based on their habitat. Females dig the nest and can spawn multiple times. The rainbow trout has an appealing flavor and is high in vitamin B.

Rainbow Trout have a total length between 20”-30” (51-76 cm), body height of 4.5”-7” (11.4-17.8 cm), and an overall weight in the range of 2-8 lb (.9-3.6 kg). The typical lifespan of the Rainbow Trout is 4-11 years.

Pair of elevation illustrations of the Rainbow Trout | Steelhead Trout seen from the side and front
Rainbow Trout (Oncorhynchus mykiss), or Steelhead Trout, receive their name from their silver color and round head. They are members of the family Salmonidae. They are native to North America and the Pacific ocean in Asia’s tributaries.

Rainbow Trout have a total length between 20”-30” (51-76 cm), body height of 4.5”-7” (11.4-17.8 cm), and an overall weight in the range of 2-8 lb (.9-3.6 kg). The typical lifespan of the Rainbow Trout is 4-11 years.

Pair of elevation illustrations of the Rainbow Trout | Steelhead Trout seen from the side and front
Rainbow Trout | Steelhead Trout
Height:
4.5”-7” | 11.4-17.8 cm
Width:
Length:
20”-30” | 51-76 cm
Depth:
Weight:
2-8 lb | .9-3.6 kg
Area:
Scientific Name
Oncorhynchus mykiss
Lifespan
4-11 years

Drawings include:

Rainbow Trout side elevation, front

Details & Downloads

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