{"id":153660,"date":"2025-08-20T15:41:10","date_gmt":"2025-08-20T13:41:10","guid":{"rendered":"https:\/\/insektenliebe.com\/nicht-kategorisiert\/cuttlefish-shells-why-they-are-the-best-source-of-calcium-for-invertebrates\/"},"modified":"2026-03-21T11:08:31","modified_gmt":"2026-03-21T10:08:31","slug":"cuttlefish-shells-why-they-are-the-best-source-of-calcium-for-invertebrates","status":"publish","type":"post","link":"https:\/\/insektenliebe.com\/en\/news-en\/cuttlefish-shells-why-they-are-the-best-source-of-calcium-for-invertebrates\/","title":{"rendered":"Cuttlefish shells – why they are the best source of calcium for invertebrates"},"content":{"rendered":"\n

Anyone involved in terraristics will quickly realize that calcium is one of the most important minerals for many invertebrates. Whether Isopods, snails, crabs or crustaceans – they all need a reliable source of this mineral to keep their shells, casings or exoskeletons stable. Calcium also plays a key role in moulting, perhaps the most critical moment in the lives of many invertebrates <\/strong>.<\/p>\n\n

The question that many owners ask themselves: How do I make sure that my animals really get enough calcium? There are countless calcium supplements on the market in powder form, often produced synthetically. However, those who prefer naturalness and ease of use prefer to use a classic: cuttlebone. <\/p>\n\n

\"Cuttlebone\"<\/figure>
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What is a cuttlebone?<\/strong>What exactly is a cuttlebone?<\/h3>\n\n\n\n

The cuttlefish shell comes from the cuttlefish Sepia officinalis, commonly known as the “common cuttlefish”. This animal belongs to the cephalopod family and is closely related to squid and octopus. Unlike these, however, the cuttlefish has a solid inner skeleton – the so-called cuttlefish shell. <\/p>\n\n\n\n

This skeleton fulfills a very special function in the life of the animal: it serves as a kind of buoyancy regulator. Thanks to a sophisticated system of many small chambers filled with gases and liquids, the cuttlefish can precisely control its position in the water. <\/p>\n<\/div><\/div>\n\n

It rises, sinks or remains floating in the sea – without any great effort. This makes the cuttlefish shell a perfect example of nature’s ingenuity, in which functionality and lightness are ideally combined. The structure of the cuttlefish shell is porous, light and at the same time amazingly stable. It consists mainly of calcium carbonate, a mineral that is also found in the shells of snails and mussels. This high mineral content makes it particularly interesting for keeping invertebrates, as it is precisely this composition that Isopods, snails and other animals need for their shells or casings. <\/p>\n\n

After the animals have died, their shells are washed up on the beaches by the waves. People have been collecting them there for centuries, drying and cleaning them for reuse. Originally, the cuttlefish shell was primarily known as a beak whetstone and mineral source for ornamental birds. However, it has long since found a permanent place in terrariums, where it serves as a natural source of calcium and thus makes an important contribution to healthy, stable invertebrates. <\/p>\n\n

In short, the cuttlebone is not only a fascinating relic from the underwater world, but also a valuable natural product that can play a central role in the terrarium – without any chemical processing or artificial additives.<\/p>\n\n

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\"Cuttlefish<\/figure>\n<\/div>\n\n\n\n
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Natural composition instead of chemicals<\/strong><\/p>\n\n

The biggest advantage of cuttlefish shells is that they consist almost entirely of calcium carbonate, a compound that is particularly easily accessible to invertebrates. It also contains small amounts of magnesium and trace elements that are important for the metabolism. <\/p>\n\n

Artificial calcium supplements, on the other hand, are often highly processed. The powder has to be mixed into the feed or sprinkled over the substrate. This always raises the question: Do the animals really eat as much of it as they need? Or is there too much left over? This problem is eliminated with cuttlefish shells, as the animals nibble or grate off exactly as much as their organism needs. <\/p>\n\n

Advantages of cuttlebone at a glance:<\/strong><\/p>\n\n