Longspine Cardinalfish



The Longspine Cardinalfish comes from the reefs of the Indian Ocean. This slim slender fish is mostly transparent in color. Its transparent hue is however offset with numerous spots and markings of both yellow and blue iridescent. The large black eyes of the fish are highlighted in iridescent blue, similar to the markings on the fins as well as the body. A larger aquarium with a cave as well as calm tank mates is perfect for this slow and deliberate swimmer. It is likely to conceal itself in seagrass and other plants and may employ long spined urchins to camouflage. If there is a bigger aquarium available, it can handle only a tiny portion of the species. As a group, they'll create a strict hierarchy, without any aggression.   The Longspine Cardinalfish requires a well-balanced diet that includes meaty foods like feeder shrimp flake food, pellets as well as bloodworms, marine flesh, and, depending on its size live feeder fish.   Approximate Purchase Size: Small: 3/4" to 1-1/4"; Medium: 1-1/4" to 2"; Large: 2" to 3"
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General info about Longspine Cardinalfish The Longspine Cardinalfish comes from the reefs of the Indian Ocean. It has a long slender shape and is mostly transparent in color. The transparent color is offset by many markings and spots of both iridescent blue and yellow. The large black eyes of this fish are outlined in iridescent blue like the markings on both the fins and body. A small to larger aquarium with a cave and peaceful tank mates is suitable for this slow and methodical swimmer. It tends to hide in seagrass or other plants or may use long spined urchins for camouflage. If a larger aquarium is available, it will handle a small group of this species. As a group, they will establish a strict hierarchy without aggressiveness.
Large, Medium, Small
6 lbs


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Frequently Asked Questions
Is hiring a professional necessary to set up a saltwater aquarium?

As a general rule, a larger custom aquarium might require installation by a professional. However, a kit from our online fish store is relatively affordable and beginner friendly. That means you should have no problem setting it up yourself.

Which saltwater aquarium fish should you choose when starting out?

Consider a yellow tang fish. This popular saltwater aquarium fish does a great job of coexisting with other types of fish you’ll find in our online fish store.

How does a saltwater aquarium differ from a freshwater one?

Saltwater aquariums require a bit more maintenance and monitoring than freshwater tanks. Different fish require different levels of salinity, pH tolerances, and temperature requirements. They also require specialized pumps, filters, and other equipment that can handle salt. We can guide you through everything you need to know to set up a healthy, thriving reef tank.

Do fish in a saltwater aquarium swim in a school?

That depends on the species. However, if it’s a fish that swims in a school in the wild, they’ll do the same in an aquarium. Some fish that swim in schools include the green and blue chromis, cardinalfish, and dartfish, for example. When ordering from an online fish store, make sure you do your research on how specific fish species behave to ensure they’ll school (or at least coexist) with your current fish.

Is the effort required to maintain a saltwater aquarium worth it?

Yes! Many aquarists dream of owning thriving saltwater aquariums. You have a tiny piece of the ocean in your home, featuring magical and exotic fish that can only survive in saltwater.