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.

Freshwater Fish Guides
Browse through our curated Freshwater Fish Guides for additional categorizations, tips, details, variations, styles, and histories of Freshwater Fish. Guides provide additional insights into the unique properties and shared relationships between elements.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
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
Smallmouth Bass

The Smallmouth Bass (Micropterus dolomieu) are popular game fish of the family Centrarchidae that love the freshwater bodies of the warm zones of North America. It is also called bronzeback, brownbass, bareback bass, bronze bass, and smallie. Females are larger than males with the fish’s color, shape, and weight being influenced by their habitats.

They love clean water free of pollution, with males creating the nest during breeding and guarding the eggs. The Smallmouth Bass is separated from the largemouth bass by its lower jaw, which does not extend past the edge of its eyes and lines that fade with age.

Smallmouth Basss have a total length between 10”-27” (25-69 cm), body height of 2.5”-6.5” (6.4-16.5 cm), and an overall weight in the range of .8-12 lb (.4-5.4 kg). The typical lifespan of the Smallmouth Bass is 5-15 years.

Pair of dimensioned elevation illustrations of the Smallmouth Bass seen from the side and front
The Smallmouth Bass (Micropterus dolomieu) are popular game fish of the family Centrarchidae that love the freshwater bodies of the warm zones of North America. It is also called bronzeback, brownbass, bareback bass, bronze bass, and smallie. They love clean water free of pollution.

Smallmouth Basss have a total length between 10”-27” (25-69 cm), body height of 2.5”-6.5” (6.4-16.5 cm), and an overall weight in the range of .8-12 lb (.4-5.4 kg). The typical lifespan of the Smallmouth Bass is 5-15 years.

Pair of dimensioned elevation illustrations of the Smallmouth Bass seen from the side and front
Smallmouth Bass
Height:
2.5”-6.5” | 6.4-16.5 cm
Width:
Length:
10”-27” | 25-69 cm
Depth:
Weight:
.8-12 lb | .4-5.4 kg
Area:
Scientific Name
Micropterus dolomieu
Lifespan
5-15 years

Drawings include:

Smallmouth Bass side elevation, front

Details & Downloads

Downloads

2D Downloads

Right Click and 'Save As' to Download

3D Downloads

Channel Catfish

The Channel Catfish (Ictalurus punctatus) are also referred to as “Channel cat” and belong to the family Ictaluridae. The fish spearheaded the rapid expansion of aquaculture in the United States. The Channel Catfish is found mainly in fresh and salty water worldwide, though was originally native to the northern and eastern United States.

The Channel Catfish is a cavity nester, preferring areas of limited light conditions and a sedentary lifestyle. The Channel Catfish is identified by its cross-sectional cylindrical body that lacks scales, dorsal and pectoral fins spotting sharp and hard spin, barbels around the mouth for tasting and smelling, and prefers to feed at night.

Channel Catfishs have a total length between 12”-24” (30.5-61 cm), body height of 2”-4.5” (5-11.4 cm), and an overall weight in the range of 2-7 lb (.9-3.2 kg). The typical lifespan of the Channel Catfish is 15-25 years.

Scaled collection of drawings of Channel Catfish in front and side poses
The Channel Catfish (Ictalurus punctatus) are also referred to as “Channel cat” and belong to the family Ictaluridae. The fish spearheaded the rapid expansion of aquaculture in the United States. The Channel Catfish is found mainly in fresh and salty water worldwide.

Channel Catfishs have a total length between 12”-24” (30.5-61 cm), body height of 2”-4.5” (5-11.4 cm), and an overall weight in the range of 2-7 lb (.9-3.2 kg). The typical lifespan of the Channel Catfish is 15-25 years.

Scaled collection of drawings of Channel Catfish in front and side poses
Channel Catfish
Height:
2”-4.5” | 5-11.4 cm
Width:
Length:
12”-24” | 30.5-61 cm
Depth:
Weight:
2-7 lb | .9-3.2 kg
Area:
Scientific Name
Ictalurus punctatus
Lifespan
15-25 years

Drawings include:

Channel Catfish side elevation, front

Details & Downloads

Downloads

2D Downloads

Right Click and 'Save As' to Download

3D Downloads

Lake Trout

The Lake Trout (Salvelinus namaycush) is loved both as a food fish and game fish. It features in the annual lake trout fishing derby of the people of Geneva and New York. The fish prefers cold freshwater lakes and rivers in northern North America.

Lake Trout are also called mackinaw, Lake char, and grey trout, and are members of the family Salmonidae distinguished by its deeply forked caudal fin, greenish body, and yellow or cream spots on its head, body, caudal, and dorsal fin. They are the largest char members having later maturity and both low reproduction and growth potential.

Lake Trout have a total length between 20”-36” (51-91 cm), body height of 4”-7” (10.2-17.8 cm), and an overall weight in the range of 4-22 lb (1.8-10 kg). The typical lifespan of the Lake Trout is 10-40 years.

Scaled collection of drawings of Lake Trout in front and side poses
The Lake Trout (Salvelinus namaycush) is loved both as a food fish and game fish. It features in the annual lake trout fishing derby of the people of Geneva and New York. The fish prefers cold freshwater lakes and rivers in northern North America.

Lake Trout have a total length between 20”-36” (51-91 cm), body height of 4”-7” (10.2-17.8 cm), and an overall weight in the range of 4-22 lb (1.8-10 kg). The typical lifespan of the Lake Trout is 10-40 years.

Scaled collection of drawings of Lake Trout in front and side poses
Lake Trout
Height:
4”-7” | 10.2-17.8 cm
Width:
Length:
20”-36” | 51-91 cm
Depth:
Weight:
4-22 lb | 1.8-10 kg
Area:
Scientific Name
Salvelinus namaycush
Lifespan
10-40 years

Drawings include:

Lake Trout side elevation, front

Details & Downloads

Downloads

2D Downloads

Right Click and 'Save As' to Download

3D Downloads

Black Crappie

The Black Crappie (Pomoxis nigromaculatus) is also called moonfish, Crappie, grass bass, and strawberry bass. It is primarily a recreational fish that love to feed in the wee hours of the morning in schools. It loves swimming around sheltered areas with a prevalent food source and away from predation by enemies.

The Black Crappie are members of the family Centrarchidae, native to freshwater lakes, reservoirs, and rivers of North America. The fish is identified by its gills covering having spines, a deeper body lacking distinct vertical bars but with irregular black blotches and a dorsal fin with 7 to 8 spines that differentiate it from the White Crappie.

Black Crappies have a total length between 4”-11” (10-28 cm), body height of 1.5”-3.75” (3.8-9.5 cm), and an overall weight in the range of 3-4 lb (1.4-1.8 kg). The typical lifespan of the Black Crappie is 7-15 years.

Scaled collection of drawings of Black Crappie in front and side poses
The Black Crappie (Pomoxis nigromaculatus) is also called moonfish, Crappie, grass bass, and strawberry bass. It is primarily a recreational fish that love to feed in the wee hours of the morning in schools. It loves swimming around sheltered areas with a prevalent food source and away from enemies.

Black Crappies have a total length between 4”-11” (10-28 cm), body height of 1.5”-3.75” (3.8-9.5 cm), and an overall weight in the range of 3-4 lb (1.4-1.8 kg). The typical lifespan of the Black Crappie is 7-15 years.

Scaled collection of drawings of Black Crappie in front and side poses
Black Crappie
Height:
1.5”-3.75” | 3.8-9.5 cm
Width:
Length:
4”-11” | 10-28 cm
Depth:
Weight:
3-4 lb | 1.4-1.8 kg
Area:
Scientific Name
Pomoxis nigromaculatus
Lifespan
7-15 years

Drawings include:

Black Crappie side elevation, front

Details & Downloads

Downloads

2D Downloads

Right Click and 'Save As' to Download

3D Downloads

Bull Trout
Measured comparison illustration of the size of a Bull Trout to a typical person

The Bull Trout (Salvelinus confluentus) are threatened species native to freshwater lakes, rivers, reservoirs, and oceans of Northwestern America. They belong to the family Salmonidae with migratory species being larger than sedentary species living in streams. They are highly identified by salmon-colored spots of yellow or orange on their backs and fins having white leading edges.

Bull Trout are highly sensitive to water temperature, salinity, and quality which are a threat to their existence. The fish can also interbreed with the brook trout in areas introduced. Females dig nests in the gravel during spawning. Bull Trout is highly popular as a cold-water game fish.

Bull Trout have a total length between 24”-34” (61-86 cm), body height of 5”-7” (12.7-17.8 cm), and an overall weight in the range of 3-9 lb (1.4-4 kg). The typical lifespan of the Bull Trout is 5-12 years.

Set of scaled elevation drawings of the Bull Trout viewed from the front and side
The Bull Trout (Salvelinus confluentus) are threatened species native to freshwater lakes, rivers, reservoirs, and oceans of Northwestern America. They belong to the family Salmonidae with migratory species being larger than sedentary species living in streams.

Bull Trout have a total length between 24”-34” (61-86 cm), body height of 5”-7” (12.7-17.8 cm), and an overall weight in the range of 3-9 lb (1.4-4 kg). The typical lifespan of the Bull Trout is 5-12 years.

Set of scaled elevation drawings of the Bull Trout viewed from the front and side
Bull Trout
Height:
5”-7” | 12.7-17.8 cm
Width:
Length:
24”-34” | 61-86 cm
Depth:
Weight:
3-9 lb | 1.4-4 kg
Area:
Scientific Name
Salvelinus confluentus
Lifespan
5-12 years

Drawings include:

Bull Trout side elevation, front

Details & Downloads

Downloads

2D Downloads

Right Click and 'Save As' to Download

3D Downloads

Related Animals Collections
Animals