A) Fused plate-like scales forming a carapace B) Long, thin needle-like scales C) Soft and flexible skin D) Large, loose circular scales
A) Because they are hunted by large predators B) Because they have small fins C) Because of their heavy armour D) Because they are weak swimmers
A) Venomous fish bite, sting, or stab to deliver toxins B) Poisonous fish are never found in tropical waters C) Poisonous fish use fangs to attack D) Venomous fish are always fatal when eaten
A) It may not cause poisoning as the digestive system often destroys the venom B) The venom becomes stronger in the stomach C) The venom is immediately absorbed into the bloodstream D) It is always lethal
A) Over 5000 B) Exactly 100 C) At least 1200 D) Around 500
A) Over 500 B) Over 10,000 C) Over 50,000 D) Over 1,000,000
A) In polar regions only B) In mountain streams C) In deep freshwater lakes D) In tropical waters
A) Communicating with other fish B) Helping them float better C) Killing bacteria that invade their skin D) Attracting mates
A) Application of ice packs B) Applying pressure with a tourniquet C) Drinking cold water D) Application of heat at about 45 °C
A) By emitting high-pitched sounds B) By jumping out of the water C) By glowing in the dark D) By using flamboyant colors
A) Venomous fish are rare compared to other vertebrates B) There are fewer venomous fish than venomous birds C) There are only 100 species of venomous fish D) There are more venomous fish than venomous snakes
A) Slithering on land like snakes B) Walking along the bottom on their fins C) Burrowing through mud like worms D) Flying through the air for miles
A) Releasing toxins through their gills B) Poisonous skin secretions only C) Spines, sharp fins, barbs, spikes or fangs D) Swallowing prey whole
A) A cylinder B) A triangle C) A circle D) A sphere
A) Tetrapod land vertebrates B) Coastal fish C) Ray-finned fishes D) Chondrosteans
A) Holosteans B) Chondrosteans C) Teleosts D) Tetrapods
A) Chondrosteans B) Teleosts C) Lobe-finned fish D) Holosteans
A) 58 percent B) 41 percent C) 96 percent D) 1 percent
A) Homocercal caudal fins B) Lobed paired fins C) Movable maxilla and premaxilla D) Modifications to the spine
A) 78 percent B) 41 percent C) 96 percent D) 58 percent
A) 41 percent B) 1 percent C) 58 percent D) 96 percent
A) 500 metres B) 100 metres C) 200 metres D) 1,000 metres
A) Twilight waters B) Shallow continental shelf C) Sunlit waters D) Cold and pitch black
A) 44 percent B) 7 percent C) 78 percent D) 13 percent
A) 500 B) 1,000 C) 100 D) 250
A) 12,500 B) 34,800 C) 25,000 D) 40,200
A) Mediterranean Sea B) Arctic Ocean C) Indo-Pacific D) Atlantic Ocean
A) Amazon B) Danube C) Nile D) Mississippi
A) 2% B) 10% C) 5% D) 20%
A) Oral sucker B) Tentacles C) Beak D) Proboscis
A) Hard scales B) No bony skeleton C) Well-developed paired fins D) Complex jaws
A) Has a skull but no vertebral column B) Has lungs and gills C) Has a completely bony skeleton D) Has no skin
A) Venomous spines B) Noxious slime C) Electric shocks D) Changing colors
A) Pancreas B) Leydig's organ C) Gallbladder D) Liver
A) They have lungs B) They lack swim bladders C) They have hard bony skeletons D) They cannot swim
A) Gobies B) Rockfish C) Cardinalfish D) Hammerheads
A) Rockfish B) Gobies C) Slingjaw wrasse D) Blue shark
A) Ultraviolet vision B) Bioluminescence C) Protusible jaws D) Echolocation
A) Ovoviviparous B) Viviparous C) Mouthbrooding D) Oviparous
A) Hammerheads B) Blue sharks C) Lamniformes D) Catsharks
A) Ocean sunfish B) Slingjaw wrasse C) Cardinalfish D) Hammerheads
A) Fixed bony plates B) Inflexible jaws C) Protusible jaws D) Suction-only tubes
A) Blue shark B) Ocean sunfish C) Catshark D) Slingjaw wrasse
A) Strict herbivore B) Filter feeder only C) Generalist/opportunist D) Specialist jellyfish eater
A) Dead whales B) Crustaceans C) Jellyfish D) Small fish
A) Radio waves B) Infrared C) Ultraviolet D) X-ray |