dinsdag 30 januari 2007

Extra informatie: zeepaardjes


Een vis waarbij de meeste mensen een positief beeld hebben: het zeepaardje (hippocampus). 'Campus' betekend 'gebogen', en 'hippo' betekend 'paard'. Het hoofd van een zeepaardje lijkt op het hoofd van een paard en heeft een lange snuit. Zijn lichaam is tamelijk plat, en hij heeft een opgerolde staart. Over zijn lijfje lopen rijen met knobbels en stekels, en geen schubben waardoor hij niet op andere vissen lijkt. Het zeepaardje zwemt op een bijzondere manier. Andere vissen zwemmen als 'vliegtuigen', schuin-omhoog, schuin-omlaag. Het zeepaardje kan door zijn rugvin, en door twee vinnen aan de zijkanten van zijn buik recht omhoog, en recht omlaag als een 'helikopter' zwemmen. Hij zwemt rechtop, maar ook al beweegt hij zijn rugvin nog zo snel, zwemmen gaat traag. Net als de Kameleon kan het zeepaardje met beide ogen naar andere richtingen kijken, zodat hij zich niet hoeft om te draaien. Nog een overeenkomst met de kameleon is dat het zeepaardje de kleur van de omgeving kan aannemen, als schutkleur. Ook kan hij patronen en tekeningen overnemen. Er zijn zo'n 35 soorten zeepaardjes. De kleinste zijn 1 cm, en de grote kunnen de 30 cm halen. Ze komen in allerlei kleuren voor. Zeepaardjes haken hun staart vaak om wieren, watergrassen en koralen, en wiegen dan zachtjes mee met het water. Zeepaardjes hebben geen tanden en geen maag zodat ze dus geen voedsel kunnen vermalen. Om toch voldoende voedingsstoffen binnen te krijgen moet een zeepaardje voortdurend eten. Ze eten kleine kreeftjes en visjes. Zelf worden ze gegeten door zeekrabben, maar hebben verder weinig natuurlijke vijanden. Dit komt waarschijnlijk omdat ze verschrikkelijk slecht te verteren zijn. Door warme stromingen zijn er al enkele zeepaardjes op de Nederlandse stranden aangespoeld, vermoedelijk worden dit er in de toekomst meer door het opwarmen van de aarde. Afbeelding: zanclus

27 opmerkingen:

Anoniem zei

Zelf vind ik zeepaartjes ontzettend lief ik ga er mischien1 tje kopen maar ik heb bang dat het dood gaat in de aquaruim.

Anoniem zei

hee ik zou graag willen weten waar je een zeepaardje kan kopen voormijn aquarium ik vin dze zo schattig .

Anoniem zei

Zeepaardjes koop je niet zomaar, komt wel even iets meer bij kijken hoor.

Als je al zegt, ik ga er 1tje kopen, daaruit blijkt dat je weinig tot niets weet van zeepaardjes.

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