Little starfish on my fish tank this am

Also, my leather coral has diminished in my tank. Could the starfish be the culprit????
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Some starfish, such as the Sand Sifting Sea Star (Astropecten polycanthus) are specifically chosen for their ability to stir up the sand in DSB's (Deep Sand Bed) in reef tanks.
Fish Tank Blown Glass Bubble Floating Starfish Aquarium Micro Landscape Ornament
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Because they are affordable, the chocolate chip starfish is a common beginner sea star. It is a relatively hardy species that is easy to keep and feed in your non-reef tank. Take the proper amount of time to drip acclimate your new purchase and you should be enjoying it for long time to come. [New] Chocolate Chip Starfish Fish Tank Aquarium ornament Decoration - COR18
Photo provided by Flickr5pcs Random Resin Cute Miniature Starfish Fish Tank Landscape Aquarium Ornaments #Unbranded
Photo provided by Flickr5pcs Random Resin Cute Miniature Starfish Fish Tank Landscape Aquarium Ornaments
Photo provided by Flickr
The Brittle Starfish is one of those reef invertebrates that is often hidden away during the day. The brittle stars come out at night and scavenge all over the bottom of the tank and on the live rock looking for bits and pieces of things to eat. The brittle stars for the most part are rather good tank mates with fish, corals and other inverts. Some are quite cool looking, including the Tiger Striped Brittle Star varieties. Colors vary quite a bit with some being light brown with darker stripes and some are dark brown with even darker stripes. They are called "brittle stars" because there arms are easily broken off as some sort of defensive mechanism.Because feeding starfish is not very complicated, it is not a big issue for you in terms of taking care of your pet starfish. The important consideration in taking care of a starfish is the condition of the entire fish tank ecosystem itself. Starfish can only thrive in aged saltwater aquariums, which means your aquarium should have already established a balanced biological order first before starfish can be introduced to it.Starfish are great additions to your saltwater aquarium because they usually move around the bottom of the aquaruum where there is sand. This is beneficial to all living creatures in the fish tank because disturbing the sand means oxygen is being circulated, which means the bacteria growing there will have more oxygen to power them, in turn increasing the chances of eliminating the threat of nitirites and ammonia. This makes the starfish a beneficial member of your aquarium, which means you should know how to feed a starfish in a salt water aquarium to take care of them. In this article, we'll discuss the proper feeding of starfish in a saltwater aquarium.This article covers a range of sea stars kept in aquaria, including the deliberate and incidental imports, the decorative and nuisance, or predatory, ones alike. The proper care of sea stars has long been an area of the hobby in need of improvement. It pains me to see fellow aquarists innocently add these animals to variously themed tanks with hardly a thought for what these creatures eat or need to survive. Many folks assume that "starfish" are simply deposit feeders that will somehow find what they need by grazing about the tank. In fact, very few sea stars can live wholly on the incidental matter that grows or collects in aquarium systems. Moreover, very few aquariums are even capable of growing enough food matter, by weight, to sustain even a single Asteroid (more about classes and groups below). In traditional "garden reef keeping," most of us strive to limit nutrients and nuisance algae by underfeeding and the use of skimmers, other grazers (such as snails, tangs, and urchins) and the cultivation of dominating coralline algae species. This tends to produce "lean" rocks and sand without much soft matter for a sea star to graze upon. In aquariums where suitable food matter does grow for surface-grazing sea stars, insufficient surface area, and hence food, per starfish is oftentimes a limiting factor. Undersized aquaria or overstocked tanks will not produce an adequate supply of potential food matter. The sobering reality about sea stars is that many slowly starve to death within a couple of years, if not mere months, of importation. Making the matter worse, a significant number of collected stars do not survive the importation process to reach a consumer's tank. To be clear, I do not mean to criticize the keeping of sea stars at large. Rather, it is my intent is to acquaint fellow aquarists with some potentially surprising realities about the collection, handling and keeping of these fascinating animals with hope for a more conscientious and responsible use of this group.