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