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ID number:811235
 
Evaluation:
Published: 06.05.2023.
Language: Latvian
Level: Elementary school
Literature: 7 units
References: Not used
Extract

Koraļļi - siltu un sāļu, galvenokārt tropu jūru bezmugurkaulnieki. Tie ir mīksti dzīvnieki - polipi, kuru ķermeņus ietver pārkaļķojusies čaula. Koraļļi augot veido dažādas formas - vēdekļus, bumbas, kolonnas vai kokus. Tie parasti aug blīvās kolonijās, kas sastāv no daudziem ģenētiski identiskiem polipiem. Dažas no koraļļu koloniju sugām veido koraļļu rifus. Koraļļi barojas ar dažādiem nelieliem organismiem, sākot ar mikroskopisko planktonu un beidzot ar nelielām zivīm. Polipa taustekļos esošās nematocistas paralizē vai nogalina saķerto upuri, tad taustekļi saraujas, lai ievadītu barību mutē.…

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