If a match is tied after 90 minutes, the two teams will play 30 minutes of extra time, separated into two 15-minute periods. In both periods, stoppage time will be calculated and added on, just like it is during the first and second halves.
Class Osteichthyes Diagnostic characters: 1. Bony endoskeleton 2. dorsal nares 3. two sets of paired fins 4. swim bladder (most species) Infraclass Teleostei Diagnostic characteristics: 1. homocercal tail 2. cycloid or ctenoid scales Ctenoid scale from Perca flavescens Perca flavcescens, the yellow perch (Mitchell 1814)
Class: 7 classes under vertebrates. Agnatha (eels) â jawless fish, no bones or paired fins, ectothermic. Chondrichthyes (sharks and rays) â cartilaginous (flexible) skeleton, paired fins, ectothermic. Osteichthyes (normal fish â perch, salmon, bass) â bony skeleton, ectothermic.Amphibia (frogs) â lay eggs in water, aquatic larval stage, ectothermic.Reptilia (snakes, turtles, alligators) â dry scaly skin, amniotic egg, internal fertilization, ectothermic.hondrichthyes (sharks and rays) â cartilaginous (flexible) skeleton, paired fins, ectothermic. Osteichthyes (normal fish â perch, salmon, bass) â bony skeleton, ectothermic. Amphibia (frogs) â lay eggs in water, aquatic larval stage, ectothermic.