Arrow crab
The cave was empty, save for one enormous violet anemone in the middle of the ceiling; arrow crabs scuttled around it on red-gold stick legs, their spiked noses lifted curiously.
Atlantis Lost, chapter 5
Barracuda
Once, a barracuda drifted into sight, glinting like a knife; it stared at them with cold eyes, then flicked its tail and was gone.
Atlantis Lost, chapter 1
Caves
Twenty fathoms down, the slope tumbled over a shallow cliff with a black crack at its base. Riakka ducked into the crack and sent a pulse of sonar in; a few glassy-eyed sentry-fish scattered past her in a flash of silver and red.
Atlantis Lost, chapter 9
Cleaner Fish
She and Helmi hooked their fingers under a ledge and swung head down as first one cleaner wrasse hurried over, then a second. They were tiny things, no bigger than a finger, with bright green flanks, yellow stripes and a black eye-spot in the middle of their backs. They looked too vulnerable to survive; but they were the safest things in the ocean. Not even a shark would attack a cleaner-fish.
Atlantis Lost, chapter 5
Comb-back
As they descended, a shape moved sluggishly: a fish as heavy as they were, thick-bodied and sullen-lipped, with a crest of spines along its back. It shook itself and flicked away as they approached: a giant comb-back, good to eat, but too hard to catch at this depth.
Atlantis Lost, chapter 5
Corals
As they went deeper, red and yellow fans of coral appeared, their echoes humming like a harp string.
Atlantis Lost, chapter 5
Cuttlefish
A cuttlefish came dawdling across the slope, saw them and shot away backwards in a spurt of sand.
(Cuttlefish can change color, as these two photos of the same animal, taken one minute apart, show vividly.)
Atlantis Lost, chapter 7
Damsel Swarm
Below on the reef, a handred damselfish had come out to feed, darting this way and that, mouths opening and closing, every one a reflection of all the others.
Atlantis Lost, chapter 5
Dolphins
The pod was gathering again, whistling and chattering: their hunt song had been magnificent, and they knew it.
Atlantis Lost, chapter 3
Eels
A grove of eels shrank back into their holes, making a sound like a gusting wind.
Atlantis Lost, chapter 5
Jewel Fish
Three myriad miles they stretched, and corals bloomed on every inch, and the ruby-fish swarmed over them like a blizzard of golden sparks.
Atlantis Lost, chapter 6
Octopus
The scent of blood was thickening; as Pel looked back the way they had come, he saw a white spotted octopus come flowing over the stones, drawn by the scent of food.
Atlantis Lost, chapter 7
Seahorse
A movement by her arm made her start. She looked around sharply. It was a peace-fish, what humans call a sea-horse, clinging with his tail to a weed-grown bollard and swaying like a scrap of weed himself.
Atlantis Lost, chapter 7
Shrimp and Anemone
Mielikki had once seen a manta roll completely upside down in pleasure as a dozen red-striped shrimps scurried over its pure white belly picking off ticks; on that enormous surface they looked like ants running across a beach.
Atlantis Lost, chapter 5
Sting ray
A gray-backed stingray, its wings as big as a boat, pushed upwards in a cloud of sand and finned away, its frilled tail swinging from side to side.
Atlantis Lost, chapter 9
Wide-eyed flounder
Once there was a flurry beneath her as a wide-eyed flounder rocketed out of the sand; then she disappeared from sight.
Atlantis Lost, chapter 11