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Red Stop Light Cardinalfish (Apogonichthys hyalinus)

Find Red Stop Light Cardinalfish across reef-livestock retailers and from fellow hobbyists on ReefDock. Compare sources, check live pricing where available, and review source-tank parameters on Reef-Trak-verified fish listings before you buy.

Red Stop Light Cardinalfish
Photo: (c) Al. Morgue, all rights reserved, uploaded by Al. Morgue
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Where to buy Red Stop Light Cardinalfish

ReefDock searches the following reef retailers for this fish. Click through to see the live price.

  • Saltwaterfish

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    Search Saltwaterfish
  • Amazon

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    Search Amazon
  • Petco

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    Search Petco

About Red Stop Light Cardinalfish

A small, slender cardinalfish with a predominantly translucent to pale body and distinctive red/orange coloration on the tail and dorsal regions. The stoplight-like red markings on the caudal peduncle and posterior body are characteristic of this species.

Key facts

Care Requirements
• Minimum 30-gallon aquarium (larger preferred for groups) • Nocturnal species; provide dim lighting and hiding spots • Stable water parameters: 72-78°F, pH 8.1-8.3, salinity 1.023-1.025 • Feed small meaty foods: mysis, copepods, frozen plankton • Peaceful; keep singly or in small established groups
Min tank size
30 gallons
Diet
carnivore
Origin
Indo-Pacific region, including waters around Indonesia, Philippines, and surrounding coral reef areas.
Feeding Schedule
2-3 times daily
Reef safety
Reef Safe
Temperament
Peaceful
Care Level
Moderate
Family
Apogonidae
Difficulty Level
Moderate - Requires some experience due to specific dietary water or tank requirements. Best suited for intermediate aquarists.
Water Parameters
Temperature: 72-78°F pH: 8.1-8.3 Salinity: 1.02-1.025
Diet Details
Feed small live or frozen foods such as copepods, amphipods, mysis shrimp, and small prepared meaty foods. This planktivore-oriented cardinalfish should be offered frequent small meals to match its natural feeding behavior.

Looking for a hobbyist seller?

ReefDock's marketplace lets reef-keepers sell fish directly to other reef-keepers with Stripe-secured checkout and live-arrival photo confirmation. Browse current fish listings on ReefDock, or list your own.

Verify the source tank before you buy

ReefDock is the sister app to Reef Trak. Sellers who maintain a Reef Trak tank log can publish source-tank parameters on eligible fish listings — so you can see the conditions a fish was raised in before you buy. Log this fish on Reef Trak.

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