Jeff Rotman / Pectoral fin of a Steepheaded parrotfish (Chlororus gibbus) in the Red Sea, Egypt.
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Alex Mustard,Alex Mustard / A signal blenny (Emblemaria hypacanthus) displays its showy dorsal fin as it extends out of its tube home. La Paz, Mexico. Sea Of Cortez, East Pacific Ocean.
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Doug Perrine / RF- Atlantic sailfish (Istiophorus albicans) attacking bait ball of Spanish sardines (Sardinella aurita) near Yucatan Peninsula, Mexico, Caribbean Sea. (This image may be licensed either as rights man...
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Pete Oxford / Whale Shark (Rhincodon typus) swimming with other tropical fish, note satellite tag to right of dorsal fin, Wolf Island, Galapagos Islands, Ecuador
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Flip Nicklin / Queen Triggerfish (Balistes vetula) portrait off of Manualita Island on the west side of Cocos Island, Costa Rica
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Fred Bavendam / Diagonal-banded Sweetlips (Plectorhinchus lineatus) school underwater, Great Barrier Reef, Queensland, Australia
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Fred Bavendam / Yellowfin Goatfish (Mulloides vanicolensis) often gather in large schools during the day and disperse at night to feed, Great Barrier Reef, Queensland, Australia
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Fred Bavendam / Yellowfin Goatfish (Mulloides vanicolensis) often gather in large schools during the day but disperse at night to feed, Great Barrier Reef, Queensland, Australia
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Norbert Wu / One-fin Flashlight Fish (Photoblepharon palpebratum) light organ under eye used in mating and attracting prey, Grand Comore Island, Indian Ocean
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Norbert Wu / Flying Fish (Exocoetidae) uses large pectoral fins to glide through the air, Saba Island, Dutch Antilles
Alex Mustard / Pink anemonefish (Amphiprion perideraion) fans its clutch of eggs with its pectoral fin (these eggs are aged 3-4 days), beneath its Magnificent sea anemone (Heteractis magnifica). Dauin, Dumaguete, Ne...