Telescope Eye Goldfish Care Guide: Simple Steps for Happy Fish

Telescope Eye goldfish are unique and mesmerizing aquatic pets with a touch of elegance and charm. Their large, protruding eyes set them apart from other goldfish varieties, making them an interesting addition to any aquarium enthusiast’s collection. It’s crucial to understand the ins and outs of Telescope Eye goldfish care to ensure your fish thrives and lives a long, happy life.

In this guide, you’ll find helpful advice and essential information to assist you in creating a comfortable environment for your Telescope Eye goldfish. From tank setup and water parameters to dietary requirements and suitable tank mates, this comprehensive guide covers it all.

So, let’s dive in and explore everything you need to know to provide top-notch care for your Telescope Eye goldfish, helping you become a responsible and successful fish keeper.

Species Overview

Telescope Eye goldfish, scientifically known as Carassius auratus, are unique and fascinating fish known for their large, protruding eyes. Originating from slow-moving Asian ponds, rivers, and lakes, they offer a wonderful addition to your aquarium. Their care requirements are manageable, making them suitable for both beginners and experienced fish enthusiasts.

Property Information
Scientific name Carassius auratus
Common names Telescope Eye goldfish, Telescope goldfish
Distribution Asian ponds, rivers, and lakes
Size 13 cm (maximum)
Lifespan 10-15 years
Diet Omnivorous
Temperament Peaceful
Minimum tank size 20-30 gallons
Temperature 65-75°F (18-24°C)
pH 7.0-8.0
Water hardness 5-19 dGH
Care level Easy to moderate
Filtration/Water Flow Low to moderate
Water type Freshwater (tolerates brackish water)
Breeding Egg-scatterer
Breeding difficulty Moderate
Compatibility Community tank with peaceful, non-aggressive fish

Origins and Natural Habitat

Telescope Eye goldfish originated in China in the early 1700s. They were among the first goldfish bred for their unique appearance, specifically their large, protruding eyes. These beautiful fancy goldfish were developed from a species of wild Prussian carp, and their initial popularity led to the many fancy varieties of goldfish seen today.

In their natural habitat, Telescope Eye goldfish are used to slow-flowing and slightly murky water. Your aquarium’s setup should try to mimic that environment as closely as possible to help your goldfish thrive. A combination of plants, rocks, and other decorations can create an ideal environment that closely resembles their natural habitat.

When maintaining your Telescope Eye goldfish aquarium, ensure the water parameters provide a healthy environment for them. These goldfish have a life expectancy of over 20 years if properly cared for, so keeping the water clean and stable is essential for their long-term health.

Remember to keep a friendly tone when introducing your Telescope Eye goldfish to their new home, and enjoy the bright colors and unique looks of these fascinating creatures.

Physical Characteristics

Size and Shape

Telescope Eye goldfish are known for their unique appearance, featuring large, protruding eyes set on the end of long cone-like stalks. These stalks can sometimes extend up to 3/4 of an inch. In terms of size, you can expect your Telescope Eye goldfish to grow up to 8 inches in length under ideal conditions.

Color and Markings

When it comes to color, Telescope Eye goldfish can exhibit a variety of hues, like orange, red, black, white, brown, or a combination. Immature fish usually appear dark brown or black but will lighten and display patterns as they mature. Color variations include solid white, red, blue, or chocolate; bi-colored red and white or black and white; or even tri-colored/calico. The specific color variation known as the Black Moor technically belongs to the Telescope Eye family, though they often have slightly shorter eye stalks.

Remember, as you care for your Telescope Eye goldfish, always be gentle when handling it as the delicate eye stalks can be easily damaged.

Lifespan and Growth Rate

Telescope Eye goldfish can brighten up your aquarium with their unique look and lively personalities. One fantastic aspect of these goldfish is their lifespan. With proper care, they can live for 10 to 15 years, and some even reach up to 20 years.

To ensure the healthy growth of your Telescope Eye goldfish, pay attention to a few key factors. First, provide them with a well-maintained habitat. This includes regular water changes, stable water parameters, and proper filtration.

In terms of nutrition, a diet consisting of high-quality pellets, vegetables, and occasional treats like frozen or live foods will support their growth. Remember, a balanced diet is crucial for their overall health and well-being.

Additionally, giving your goldfish enough space to swim and grow is vital. For a single Telescope Eye, a minimum of a 20-gallon tank is recommended, with an additional 10 gallons per extra goldfish. Space allows them to reach their full potential size, typically between 4 and 6 inches, with some reaching up to 8 inches in length.

Follow these guidelines, and your Telescope Eye goldfish will enjoy a long, healthy life as a cherished pet for years to come.

Diet and Feeding

Feeding your Telescope Eye goldfish a balanced diet is crucial for their health and well-being. Offer them a mix of high-quality pellet or flake food, as well as fresh and frozen foods, such as peas, spinach, and bloodworms.

To provide variety, you can occasionally give them live foods like daphnia and brine shrimp. Remember that goldfish are prone to overeating, so regular feeding with proper portions is essential. Feed your fish once or twice a day, giving them small amounts of food that they can consume within 1-2 minutes.

When introducing new foods, do it gradually to avoid digestive problems. For example, if you’re adding fresh veggies, start with small portions and observe how your fish reacts.

Besides diet, maintaining pristine water conditions is of utmost importance. Perform regular water changes and keep an eye on the water temperature, which should be between 65-75°F (18-24°C). It’s also essential to monitor water parameters, ensuring ammonia and nitrite levels stay at zero. This attention to detail will help promote your Telescope Eye goldfish’s optimal health and longevity.

Behavior and Temperament

Telescope Eye goldfish are known for their calm and peaceful nature. They get along well with other non-aggressive fish, making them a great addition to your community aquarium. However, be mindful that their unique eye shape can limit their vision, causing them to navigate their tank slowly and cautiously.

Since these fish are not very agile swimmers, it’s essential to create a safe and comfortable environment for them. Make sure you avoid placing sharp objects or decorations with small openings in your tank, as it will protect your Telescope Eye goldfish from any potential injuries.

When it comes to feeding time, Telescope Eye goldfish might need a little extra patience due to their limited vision. Scatter food across the aquarium or use slow-sinking pellets to make it easier for them to locate their meals. Your goldfish will appreciate the extra effort, ensuring they maintain a balanced diet and remain healthy.

In conclusion, paying attention to the behavior and temperament of Telescope Eye goldfish is crucial to ensure their happiness. By understanding their unique needs and taking care to provide a safe and comfortable environment, you can enjoy watching your goldfish thrive.

Care and Tank Requirements

Tank Size

To keep your Telescope Eye goldfish happy, you should provide them with a tank that’s at least 20 gallons for a single fish, with an additional 10 gallons of space for each extra goldfish. This is because they need room to swim and forage for food.

Water Parameters (Temperature and pH)

Telescope Eye goldfish thrive in water with a temperature range of 65 to 75 °F. Maintaining a stable temperature is important for their health. The ideal pH for these fish is between 6.5 and 7.5, which is slightly neutral to mildly alkaline.

Tank Setup and Decorations

Creating a comfortable environment is essential for your Telescope Eye goldfish. Use a soft, sandy substrate to prevent injuries to their delicate eyes. You can add smooth rocks, driftwood, and live plants, like Anubias or Java Ferns, as they won’t harm your fish and help maintain good water quality. Keep the decorations to a minimum and provide ample open space for the fish to swim easily.

Filtration and Aeration

A combination of mechanical and biological filtration systems is recommended for maintaining optimal water quality. Regular partial water changes will also help keep the water clean. As Telescope Eye goldfish produce a significant amount of waste, efficient filtration is important to remove toxins and maintain a stable environment. For proper aeration, use an air pump with an air stone or diffuser to ensure your goldfish receive enough oxygen to stay healthy.

Suitable Tank Mates

As a Telescope Eye goldfish owner, finding the right tank mates is essential for creating a harmonious aquatic environment. Goldfish are peaceful creatures that thrive when kept in groups, so here are a few fantastic options for your aquarium:

  • Fancy goldfish varieties (Lionhead, Celestial, Black Moors, Bubble Eye)
  • Large shrimp varieties
  • Snail species that are safe for plants

It’s essential to avoid slim-bodied goldfish, as they’re faster swimmers and could outcompete your Telescope Eye goldfish for food. Additionally, be cautious about adding very tiny fish that might be seen as food by your goldfish. Finally, steer clear of notorious fin-nippers that can cause stress for your fish.

Remember, a friendly and harmonious tank will lead to happier, healthier fish. So, go ahead and carefully select your Telescope Eye goldfish’s new tank friends to create a delightful and lively aquatic community.


Telescope Eye goldfish are unique and rewarding pets to care for. With their distinctive appearance, they can be the center of attention in your aquarium. By providing them with proper care, you’ll give them the best chance to thrive and enjoy a happy, healthy life.

Remember to maintain a clean and stable environment, provide a balanced diet, and monitor their health conditions. Your dedication to their well-being will lead to a strong bond and an unforgettable fishkeeping experience. Happy fishkeeping!