Fish
Gill-bearing aquatic vertebrates maneuvering with specialized fins and tracking water flow with lateral lines.
Siamese Fighting Fish
A fish up to 6.5 cm long that breathes air through a labyrinth organ, and whose males flare their gill covers at each other.
Sockeye Salmon
A silver sea-going fish that turns bright red and swims back to the freshwater system where it hatched.
Striated Frogfish
The lure-twitching frogfish whose surprise attack pulls in prey within six milliseconds as its mouth expands up to twelve times.
Swordfish
A fish with a heater for its brain and a flattened bill it apparently uses to slash prey.
Thorny Seahorse
A seahorse with extremely sharp spines, a crown on its head and fathers that carry the babies.
Volta Electric Eel
The biological super-battery that hit 860 volts, the strongest electric discharge known from any living animal.
Wels Catfish
Europe's largest freshwater fish, and on one French river, a hunter that beaches itself to grab pigeons off a gravel island.
White-Spotted Pufferfish
A 12-centimeter pufferfish that spends 7 to 9 days digging a sand circle about 2 meters wide to impress a date.
Yellowfin Tuna
A warm-muscled torpedo that can swim across an entire ocean.