Saltwater Fish are fish that are found in the oceans or marine environments. Saltwater fish are categorized based on the marine environment they live in. Attributes that define a marine environment for a saltwater fish are, the temperature of the water, the depth or flow of the water, the water’s PH, the amount of salt in the water, the alkalinity of the water, and the location of the water including coastal environments to coral reefs and open oceans. Saltwater Fish can either live alone or in big groups of fish, called schools. Saltwater Fish can be hunted for food or to keep in captivity, such as aquariums, for entertainment.

What do saltwater fish eat?


Saltwater fish can carry carnivore, herbivore, or omnivore diets. Herbivore saltwater fish consume both microalgae and macroalgae as well as seagrasses. A carnivore’s diet typically consists of shrimp, plankton, and tiny crustaceans. Some carnivores may eat worms, clams, and parasites. Most carnivore saltwater fish will not eat algae even if they are starving.

Why can’t saltwater fish live in freshwater?

Saltwater fish are not able to live in freshwater because their bodies are concentrated from salt solution. Saltwater fish would not be able to osmoregulate correctly in freshwater. Freshwater would flow into their body up to the point where all cells can accumulate water causing them to bloat and die.

How do you acclimate saltwater fish?

Saltwater fish can be acclimated in a couple of ways. This can be done by modifying the water’s salinity, altering the pH of the water, and using the drip method or the floating method. It is important to acclimate saltwater fish because changes in salinity, water temperature, and water chemistry can cause stresses that shock the fish to death.

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Australian Ghost Shark
Comparison illustration of the size of a Australian Ghost Shark to a typical person

The Australian Ghost Shark (Callorhinchus Milii), also known as a chimaera, is cartilaginous fish related to the shark. Ghost Sharks have 1 gill on each side of their body and have eyes that are lined with a reflective tissue that appears to glow. Their skeletons are made out of cartilage and lack scales.

Ghost sharks live in the cool waters of the continental shelves around the world. Ghost sharks typically eat small fishes and invertebrates. Not much is known about the ghost shark as they haven’t been studied much in their natural habitat.

Australian Ghost Sharks have a total length between 26”-49” (66-125 cm) and an overall weight in the range of 6.6-8.8 lb (3-4 kg). The typical lifespan of the Australian Ghost Shark is between 10-15 years.

Scaled collection of drawings of Australian Ghost Shark in various poses
The Australian Ghost Shark (Callorhinchus Milii), also known as a chimaera, is cartilaginous fish related to the shark. Ghost Sharks have 1 gill on each side of their body and have eyes that are lined with a reflective tissue that appears to glow. Unlike other fish, they lack exterior scales.

Australian Ghost Sharks have a total length between 26”-49” (66-125 cm) and an overall weight in the range of 6.6-8.8 lb (3-4 kg). The typical lifespan of the Australian Ghost Shark is between 10-15 years.

Scaled collection of drawings of Australian Ghost Shark in various poses
Australian Ghost Shark
Height:
Width:
Length:
26”-49” | 66-125 cm
Depth:
Weight:
6.6-8.8 lb | 3-4 kg
Area:
Scientific Name
Callorhinchus milii
Lifespan
10-15 years

Drawings include:

Australian Ghost Shark side elevation, side (perspective), front, top

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Atlantic Tarpon
Dimensioned comparison drawing of the Atlantic Tarpon compared to an average person

The Atlantic Tarpon (Megalops atlanticus) can be found in the Atlantic ocean and Indo-Pacific seas and also often in freshwater environments. They belong to the family Megalopidae and love warm shallow darker waters having sandy and muddy bottoms.

They sport large eyes, shiny silvery scales, and blue to green backs plus an elongated dorsal fin ray and anal fin ray. The Tarpon exhibit three distinctive levels of development that take place in varying habitats. It is a popular game fish because of its high-flying antics, elusive nature, size, and fighting spirit. Besides, the tarpon also has a swim bladder that it also uses as a respiratory organ.

Atlantic Tarpons have a total length between 5’-8’ (152-244 cm), body height of 12”-19” (30.5-48 cm), and an overall weight in the range of 60-280 lb (27-127 kg). The typical lifespan of the Atlantic Tarpon is 30-55 years.

Pair of elevation illustrations of the Atlantic Tarpon seen from the side and front
The Atlantic Tarpon (Megalops atlanticus) can be found in the Atlantic ocean and Indo-Pacific seas and also often in freshwater environments. They belong to the family Megalopidae and sport large eyes, shiny silvery scales, and blue to green backs plus an elongated dorsal and anal fin rays.

Atlantic Tarpons have a total length between 5’-8’ (152-244 cm), body height of 12”-19” (30.5-48 cm), and an overall weight in the range of 60-280 lb (27-127 kg). The typical lifespan of the Atlantic Tarpon is 30-55 years.

Pair of elevation illustrations of the Atlantic Tarpon seen from the side and front
Atlantic Tarpon
Height:
12”-19” | 30.5-48 cm
Width:
Length:
5’-8’ | 152-244 cm
Depth:
Weight:
60-280 lb | 27-127 kg
Area:
Scientific Name
Megalops atlanticus
Lifespan
30-55 years

Drawings include:

Atlantic Tarpon side elevation, front

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Giant Trevally
Scale illustration of an average Giant Trevally with dimensions length compared to a human

The Giant Trevally (Caranx ignobilis), also known as Ulua, barrier trevally, giant kingfish, and lowly trevally, are fish that belong to the family Carangiformes and inhabit the warm waters of the Pacific and Indian ocean. They are popular gamefish and not edible for the possibility of ciguatera poisoning.

These animals are identified by their strong tail scutes and steep head profiles. The Giant Trevally prefers solitary life and only congregates in schools to feed or reproduce. Juveniles are silvery-grey while mature male Giant Trevally have black colorations and spot an intimidating stare. They love to follow sharks and seals to feed on forgotten prey.

Giant Trevallies have a total length between 33”-67” (85-170 cm), body height of 10”-20” (25.4-50.8 cm), and an overall weight in the range of 33-132 lb (15-60 kg). The typical lifespan of the Giant Trevally is 10-25 years.

Pair of elevation illustrations of the Giant Trevally seen from the side and front
The Giant Trevally (Caranx ignobilis), also known as Ulua, barrier trevally, giant kingfish, and lowly trevally, are fish that belong to the family Carangiformes and inhabit the warm waters of the Pacific and Indian ocean. They are popular gamefish and not edible for the possibility of poisoning.

Giant Trevallies have a total length between 33”-67” (85-170 cm), body height of 10”-20” (25.4-50.8 cm), and an overall weight in the range of 33-132 lb (15-60 kg). The typical lifespan of the Giant Trevally is 10-25 years.

Pair of elevation illustrations of the Giant Trevally seen from the side and front
Giant Trevally
Height:
10”-20” | 25.4-50.8 cm
Width:
Length:
33”-67” | 85-170 cm
Depth:
Weight:
33-132 lb | 15-60 kg
Area:
Scientific Name
Caranx ignobilis
Lifespan
10-25 years

Drawings include:

Giant Trevally side elevation, front

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Mahi-Mahi | Common Dolphinfish
Dimensioned comparison drawing of the Mahi-Mahi compared to an average person

The Mahi-Mahi (Coryphaena hippurus), also known as the common Dolphinfish, are found in most warm, tropical, and subtropical oceans of the earth. They belong to the family Coryphaenidae with males being larger than females.

Females have round heads while males have prominent protruding foreheads. They have a single long-based fin running along their compressed, slightly slender, long body from the head to the tail. They also have sharply concave caudal and anal fins. The Mahi-Mahi’s side and back show a mix of dazzling green or bright blue colors. The fish also changes color when out of the water and are highly prized as a commercial and sport fish.

Mahi-Mahis have a total length between 33”-55” (84-140 cm), body height of 6.5”-10.5” (16.5-26.7 cm), and an overall weight in the range of 15-40 lb (7-18 kg). The typical lifespan of the Mahi-Mahi is 4-5 years.

Pair of elevation illustrations of the Mahi-Mahi seen from the side and front
The Mahi-Mahi (Coryphaena hippurus), also known as the common Dolphinfish, are found in most warm, tropical, and subtropical oceans of the earth. They belong to the family Coryphaenidae and are a highly prized game fish in commercial and sport fishing.

Mahi-Mahis have a total length between 33”-55” (84-140 cm), body height of 6.5”-10.5” (16.5-26.7 cm), and an overall weight in the range of 15-40 lb (7-18 kg). The typical lifespan of the Mahi-Mahi is 4-5 years.

Pair of elevation illustrations of the Mahi-Mahi seen from the side and front
Mahi-Mahi | Common Dolphinfish
Height:
6.5”-10.5” | 16.5-26.7 cm
Width:
Length:
33”-55” | 84-140 cm
Depth:
Weight:
15-40 lb | 7-18 kg
Area:
Scientific Name
Coryphaena hippurus
Lifespan
4-5 years

Drawings include:

Mahi-Mahi side elevation, front

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

The Roosterfish (Nematistius pectoralis) belong to the fish family Mematistiidae inhabiting the East Pacific oceans, starting from Baja in California to Peru. The fish is a popular saltwater game fish because of its deep hard fight. They are identified by the arrangement of their ears and a swim bladder used to amplify sound and body covered in bluish-gray color.

It gets its name from its seven elongated dorsal fin spines. The base of their pectoral fin has a dark spot. Roosterfish love near-shore areas, reefs, and sandy in-shore waters and can be hunted using fly-fishing, live baits, and even spinners.

Roosterfish have a total length between 48”-63” (122-160 cm), body height of 13”-16.5” (33-41.9 cm), and an overall weight in the range of 25-80 lb (11-36 kg). The typical lifespan of the Roosterfish is 20-35 years.

Pair of elevation illustrations of the Roosterfish seen from the side and front
The Roosterfish (Nematistius pectoralis) belong to the fish family Mematistiidae inhabiting the East Pacific oceans, starting from Baja in California to Peru. The fish is a popular saltwater game fish because of its deep hard fight. They are identified by their ear arrangements and swim bladder.

Roosterfish have a total length between 48”-63” (122-160 cm), body height of 13”-16.5” (33-41.9 cm), and an overall weight in the range of 25-80 lb (11-36 kg). The typical lifespan of the Roosterfish is 20-35 years.

Pair of elevation illustrations of the Roosterfish seen from the side and front
Roosterfish
Height:
13”-16.5” | 33-41.9 cm
Width:
Length:
48”-63” | 122-160 cm
Depth:
Weight:
25-80 lb | 11-36 kg
Area:
Scientific Name
Nematistius pectoralis
Lifespan
20-35 years

Drawings include:

Roosterfish side elevation, front

Details & Downloads

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