Clams For Aquariums
The term clam is used to describe a number of molusks with bivalve (two part) shells that are hinged at the back. They are roughly oval on shape with the edges of the shell sometimes decoratively frilled where they meet. These invertebrates can be very long lived and grow to a large size in some circumstances. The clam is in fact the oldest living creature with a 405 year old specimen caught in 2007. All clams get at least part of their food from filtering the water they are kept in.
The same species of clam often occurs with a range of different colors. The inside of the tissue is typically the brightest part and can be seen when the clam is feeding. Colors seen include blue, purple, pink, yellow and brown.
One of the most popular clams for the aquariums is the tridacna maxima. It looks like the classic giant clam but grows to only 20cm. This makes it well suited to a captive environment amongst other tropical reef organisms.
The fluted giant clam or tridacna squamosa is another choice. This species grows twice as large to more than a foot wide. It's shell has 'scutes' which appear to be pieces of shell flaking off in curved scales. Despite it's appearance this growth is permanently fixed to the shell. This interesting species works in a symbiotic with photosynthesizing microbes. During the light hours the clam will open out it's inner tissue to allow the photosynthesis to occur. In turn the microbes provide the mollusk with much of it's sustenance.
Bear's paw of horse hoof clams are known for their deeply ridged exterior.The shell is also decorated with small dark bands on each rib.
Clams For Sale
Different species of tridacna are the typical clam types offered in pet stores and online. Colors vary so there will be different choices to visually compliment your existing tank. Larger clams for sale will generally be less expensive than smaller specimens. People can buy clams when small and watch them grow in their aquarium over time.
Below are clams currently being offered by eBay sellers.