what are the basic characteristics of elasmobranch fishes?
478626
['Skeleton is made of cartilage rather than bone.', 'Five to seven gill openings on each side.', 'Rigid dorsal fins (and spines if present)', 'Spiracles to aid in breathing.', 'Placoid scales (dermal denticles)', 'The upper jaw of elasmobranchs is not fused to their skull.']
276673
['They are bilaterally symmetrical.', 'They are triploblastic, which three layers.', 'They show organ system grade of organisation.', 'The body is soft and unsegmented.', 'Body is divisible into three regions – head, a visceral mass, and ventral foot.', 'Body is covered by a mantle and shell.']
1373647
['They are widely distributed, aquatic or terrestrial, parasitic or free-living.', 'Their body is elongated, cylindrical, unsegmented, worm-like, bilaterally symmetrical and tapering at both ends.', 'They are triploblastic animals with perivisceral cavity more extensive than that of platyhelminths.']
706501
The maximum recorded length for C. perezi is 116 inches (295 cm). Maturity occurs at approximately 60 to 66 inches (152-168 cm) in males and 79 to 116 inches (200-295 cm) in females. The size at birth is below 29 inches (74 cm). Like many sharks, the Caribbean reef shark mainly eats bony fishes.
34273
['Fast growth.', 'Rapid reproduction.', 'High dispersal ability.', 'Phenotype plasticity (the ability to alter growth form to suit current conditions)', 'Tolerance of a wide range of environmental conditions (Ecological competence)']
708486
The albacore has an elongate, fusiform body with a conical snout, large eyes, and remarkably long pectoral fins. Its body is a deep blue dorsally and shades of silvery white ventrally. Individuals can reach up to 1.4 m (4.6 ft) in length.
1310812
['Four-chambered heart.', 'Hair.', 'Mammary glands.', 'Internal skeleton.', 'Ability to regulate their body temperature internally (warm-blooded)']
632803
Class Osteichthyes includes all bony fishes. Like all fishes, Osteichthyes are cold-blooded vertebrates that breathe through gills and use fins for swimming. Bony fishes share several distinguishing features: a skeleton of bone, scales, paired fins, one pair of gill openings, jaws, and paired nostrils.
342215
Mudskippers have fins, gills, and all the other characteristics of a fish. Just because they come out on land, that does not make them amphibians or reptiles. ... Reptiles and amphibians have limbs, not fins. Even the coelacanth has fins, not limbs.
1166362
['A good range is 76° to 80°F (25° to 27°C). A few species need to be kept several degrees warmer, and some species require temperatures a few degrees cooler.', 'A thermometer is vital. ... ', 'For tropical fishes a reliable heater is necessary, at least during the colder months of the year.']
665081
Grey reef sharks have triangular, serrated and very sharp teeth. They usually have 14 teeth in the upper jaw and 13 in the lower jaw. Grey reef shark swims slowly most of the time, but it can achieve the speed of 25 miles per hour when chasing the prey. Grey reef sharks are active throughout the whole day.
373751
The five characteristic features of chordates present during some time of their life cycles are a notochord, a dorsal hollow tubular nerve cord, pharyngeal slits, endostyle/thyroid gland, and a post-anal tail.
590249
Sharks are fish. They live in water, and use their gills to filter oxygen from the water. Sharks are a special type of fish known because their body is made out of cartilage instead of bones like other fish.
163031
['They possess an exoskeleton.', 'They have jointed appendages.', 'Their body is segmented.', 'They are bilaterally symmetrical.', 'They possess an open circulatory system.']
146921
['Zebra shark. Length: 2.5 metres (8.2 feet) ... ', 'Blacktip shark. Length: 2.8 metres (9.2 feet) ... ', 'Nurse shark. Length: 3 metres (10.1 feet) ... ', 'Sand tiger shark. ... ', 'Basking shark. ... ', 'Whale shark. ... ', 'Megalodon!']
97739
As chordates, all vertebrates have a similar anatomy and morphology with the same qualifying characteristics: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail.
283198
['Radially Symmetrical.', 'Body multicellular, few tissues, some organelles.', 'Body contains an internal cavity and a mouth.', 'Two different forms exist, medusa and polyp.', 'Reproduction is asexual or sexual.', 'Has a simple net like nervous system.', 'Has a distinct larval stage which is planktonic.']