If you want pictures of fish for book illustration, you can get the images from Anima. Some of the fish pictures from the collection are:
Clown Triggerfish: This Clown Triggerfish has beautiful large white spots against a dark grey/black body. The making makes them uniquely distinctive as you can see in the marine image attached. This fish can reach up to a length of 50 cm.
Spotfin Lionfish2: The Spotfin Lionfish has red, white, and black vertical stripes along its body. They have beautifully fanned fins, lined with venomous spines. They can grow to a length of about 7 inches.
Harlequin Tuskfish: The Harlequin Tuskfish are beautiful fish that have large white strips against a contrasting bright red body. These stripes are edged with a bright blue, providing them a striking appearance as you can see in the marine image. They can reach up to a length of about 12 inches.
Basslet, Orange 1: The Basslet is found in the West Indian Ocean. As you can see in the marine image attached, the species is sexually dimorphic, i.e., the males and the females of this species look different. The females are of bright orange/yellow color with a light purple stripe below the eye, while the males are of dark purple color with a high dorsal fin.
Emperor Angelfish2: Emperor Angelfish are found in various parts of the world, like on the shores of the Indian Ocean and the Red Sea. They look the same as in the marine image attached. They have strips of yellow and blue and have two black dots around their eyes.
Bicolour Parrotfish2: As you can see in the marine image of the fish, its thick, prominent lips have some resemblance with the beak of a parrot. That’s why it is named so. The fish really has some amazing colors, which make it look beautiful.
Blueface Angelfish: This species of the Angelfish family is the most colorful. The marine image clearly shows why this fish is named so. Their color varies among the different shades of blue and yellow, with its face of blue color. They are mainly found in the Indian and Pacific oceans.
