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jutter.nl
https://www.jutter.nl/bijzondere-schenking-voor-pieter-vermeulen-museum
Bijzondere schenking voor Pieter Vermeulen Museum
Ze komen uit de periodes van het Siluur en het Devoon, wat betekent dat ze tussen de 350 en 440 miljoen jaar oud zijn. Zeelelies zijn overigens, anders dan de naam doet vermoeden, geen planten, maar dieren. Ze behoren tot de stekelhuidigen, net als zeesterren, zee-egels en zeekomkommers. Zeelelies bestaan nog steeds.
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duikeninbeeld.tv
Zeekomkommers - vijf weetjes – DuikeninBeeld
greelane.com
8 prettige feite oor seekomkommers
reefsecrets.org
Zeekomkommers: De Stofzuigers van de oceanen
dierenwiki.nl
Zeekomkommers | DierenWiki | Stekelhuidigen | Zeekomkommers
diertjevandedag.be
zeekomkommers – het diertje van de dag
duikeninbeeld.tv
Hoe poept een zeekomkommer? – DuikeninBeeld
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Noordhollandsdagblad
https://m.noordhollandsdagblad.nl/cnt/dmf20240422_51358880
Expositie schelpen en fossielen in Pieter Vermeulen Museum in …
WebApr 22, 2024 · Ze komen uit de periodes van het Siluur en het Devoon, wat betekent dat ze tussen de 350 en 440 miljoen jaar oud zijn. Zeelelies zijn overigens, anders dan de naam …
Duikspotter
https://duikspotter.nl/bretagne-door-de-geleende-biologische-lens
Bretagne, door de (geleende) biologische lens - Duikspotter
WebApr 23, 2024 · Daar zit het vol met heremietkreeftjes, die gebogen gaan onder enorme anemonen op hun schelp, kleine spinkrabjes, pijlinktvissen, zeekomkommers, van alles! …
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Zeekomkommers | National Geographic
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Zeekomkommerpoep belangrijk voor ecosystemen | National …
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Is deze zeekomkommer nu echt aan het... - National Geographic
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Zeekomkommers reinigen de bodem
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Zeekomkommers - vijf weetjes
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WordsSideKick.com
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Duikwetenschappers Rapporteren 'Grote Veranderingen' Onder De ...
WebApr 25, 2024 · Hoewel de diepte van de duikplekken onder de ijsplaat slechts ongeveer 66 voet (20 meter) is, is het schaarse dierenleven dat daar wordt aangetroffen vergelijkbaar …
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WebApr 24, 2024 · Je kunt er tal van kleurrijke vissen en zeekomkommers bewonderen. Daarbovenop is er ook nog een klein strandje waar je kunt zonnebaden. Vanuit Coral …
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World Register of Introduced Marine Species (WRiMS)
WebMay 5, 2024 · context source (PeRMS) Solís-Marín, F. A.; Alvarado, J. J.; Abreu-Pérez, M.; Aguilera, O.; Alió, J.; Bacallado-Aránega, J. J.; Barraza, E.; Benavides-Serrato, M ...
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Sea cucumber
Class of echinoderms
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Sea cucumbers are echinoderms from the class Holothuroidea. They are marine animals with a leathery skin and an elongated body containing a single, branched gonad. They are found on the se…
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Sea cucumbers are echinoderms from the class Holothuroidea. They are marine animals with a leathery skin and an elongated body containing a single, branched gonad. They are found on the sea floor worldwide. The number of known holothurian species worldwide is about 1,786, with the greatest number being in the Asia-Pacific region. Many of these are gathered for human consumption and some species are cultivated in aquaculture systems. The harvested product is variously referred to as trepang, namako, bêche-de-mer, or balate. Sea cucumbers serve a useful role in the marine ecosystem as they help recycle nutrients, breaking down detritus and other organic matter, after which bacteria can continue the decomposition process.
Wikipedia
Domain Eukaryota
Kingdom Animalia
Phylum Echinodermata
Subphylum Echinozoa
ClassHolothuroidea
The Soft and Spiny Echinoderms
You might have heard of starfish and sea urchins, but do you know about their cousins, the sea cucumbers? These are some of the strangest and most diverse creatures in the ocean.
Life cycle
Fertilization
Sea cucumbers release gametes into the water for external fertilization.
Larval development
Fertilized eggs develop into free-swimming planktonic larvae with various stages.
Metamorphosis
Larvae settle on the seafloor and undergo metamorphosis into juvenile sea cucumbers.
Regeneration
Sea cucumbers can regenerate lost or damaged body parts, such as tentacles, skin, or organs.
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Marine animals with a leathery skin and an elongated body containing a single, branched gonad.
Distinctive breed
Pelagothuria Natatrix
Many sea cucumbers can expel their internal organs through the anus and grow new ones.
They are often ignored by most of the marine predators because of the toxins they contain (in particular holothurin) and because of their often spectacular defensive systems.
Most sea cucumbers have no distinct sensory organs, although there are various nerve endings scattered through the skin, giving the animal a sense of touch and a sensitivity to the presence of light.
They extract oxygen from water in a pair of "respiratory trees" that branch in the cloaca just inside the anus, so that they "breathe" by drawing water in through the anus and then expelling it.
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This species is exploited for its edible body wall and has been overfished in many regions. It is also vulnerable to coral bleaching and habitat degradation.
Stichopus horrens
This species is one of the most valuable sea cucumbers in the world market and has been heavily harvested in the Galapagos Islands, Ecuador, Peru, and Colombia. It is listed as endangered by the IUCN.
Isostichopus fuscus
This species is also known as the pineapple sea cucumber or the prickly redfish. It is highly sought after in Asia for its large size and high quality. It is overexploited in many parts of its range and is considered vulnerable by the IUCN.
Thelenota ananas
This species is also known as the black teatfish or the sandfish. It is a delicacy in China and other Asian countries and is subject to illegal and unregulated fishing. It is listed as endangered by the IUCN.
Holothuria whitmaei
This species is also known as the deep-water redfish or the brownfish. It is harvested for its high-quality beche-de-mer and is overfished in many areas. It is considered vulnerable by the IUCN.
Actinopyga echinites
Image: Getty Images. Data: Wikipedia · en.wikipedia.org · britannica.com
Wikipedia text under CC-BY-SA license
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