Josh's Frogs LogoJosh's Frogs Logo

Josh's Frogs

HomeAny CategoryLive AnimalsFrogsPoison Dart FrogsDendrobates tinctorius 'Cobalt' | Dyeing Poison Arrow Frog (Captive Bred)

Dendrobates tinctorius 'Cobalt' | Dyeing Poison Arrow Frog (Captive Bred)


5.0 out of 5 stars


Quantity Price Breaks

Quantity Available: 13

About This Product

Defining Characteristics:

  • Great beginner frog
  • Bright blue and yellow coloration
  • Bold
  • Easy to breed
  • Quiet call
  • Large
  • Best Kept in Pairs
  • F1s also available - new blood from 2017 imports

Name: Dendrobates tinctorius 'Cobalt'. Named for the bright blue coloration present on the belly and legs of this attractive frog. Commonly called the Dyeing Poison Dart Frog (based on an early belief that natives used brightly colored frogs to dye fabric).

Recommended Vivarium Size: A 10 gallon aquarium is suitable for a single Dendrobates tinctorius 'Cobalt', but Josh's Frogs recommends a 20H or 18x18x18 Vivarium for 1-3 frogs. Not sure how to set up a vivarium? Please watch our video on How to Set Up a Vivarium.

Temperature: They can tolerate a temperature range of 65 F to 80 F, but prefer temperatures in the low to mid 70s. Temperatures over 85F are dangerous.

Humidity: Like most poison dart frogs, Cobalt prefer a humidity range of 70 – 100%, but can tolerate humidity down to 50% for short periods of time if the frogs have access to water. Low humidity levels, especially without access to water, can quickly be fatal.

Size: Adult female Cobalt are larger, measuring in at approximately 2 inches. Male Cobalt are a bit smaller, averaging about 1.75 inches at maturity. All of the Dendrobates tinctorius 'Cobalt' froglets Josh's Frogs sells are well started juveniles, and measure at least 5/8” long.

Age: Dendrobates tinctorius 'Cobalt' is capable of living well over 20 years in captivity under ideal conditions, although a lifespan of 10 years is more common. In the wild, it is thought that Cobalt may live 4-6 years. All Cobalt for sale at Josh's Frogs are well started juveniles, and are 2-3 months old.

Feeding: Like most poison dart frogs, Cobalts prefer smaller foods. All of the Cobalts Josh's Frogs sells will readily eat Drosophila melanogaster fruit flies. Adult Dendrobates tinctorius 'Cobalt' will readily consume Drosophila hydei fruit flies and pinhead crickets. All ages of poison dart frogs will enjoy springtails and isopods. All feeder insects should be dusted with a vitamin/mineral supplement. For more information on what poison dart frogs can eat, please visit our How-To Guide on Feeding Poison Dart Frogs.

Sexing: Dendrobates tinctorius 'Cobalt' is not sexable until 10-12 months of age. Male Cobalts tend to be smaller than females, which often appear both longer and wider. Males also tend to have wider front toe pads and a less defined back arch than females. Josh's Frogs sells 2-3 month old juveniles that are not sexable unless otherwise noted. For more information on sexing poison dart frogs, please visit our How-To Guide on Sexing Poison Dart Frogs.

Color/Pattern: Cobalts are mostly blue and black in color with a varying degree of yellow on the back. The blue is typically a very dark, deep blue. Some Cobalts display a lot of yellow, while some show just faint yellow lines. Josh's Frogs does not recommend, support, or endorse line breeding as we believe this leads to weaker captive animals and nature has done a wonderful job of creating an amazing variation in color and pattern of poison dart frogs already.

Social Behavior: These frogs do well housed in groups up to sexual maturity, as long as enough space is provided. Josh's Frogs recommends approximately 10 gallons per frog. As they reach sexual maturity at 10-12 months of age, the social dynamic in a group of Dendrobates tinctorius may change, and all but one female may need to be removed. Female D. tinctorius may fight with each other over a mate. For that reason, many breeders recommend keeping Cobalt in pairs as adults. Josh's Frogs strongly recommends against housing different species/morphs of dart frogs - for the health of your pets, please avoid mixing! Josh's Frogs recommends purchasing multiple frogs if you are interested in breeding them – this greatly increases the chances of getting a pair.

Breeding: Cobalts are very simple and easy to breed. Like most Dendrobates tinctorius, Cobalts are best bred in pairs as adult females may fight with each other in the presence of a male. Generally, eggs are deposited on a smooth broad leaf, or on a petri dish under a cocohut. The eggs hatch into tadpoles, which then take 60-80 days to complete metamorphosis into miniature versions of the adults. For more information on breeding and raising poison dart frogs, please visit our How-To Guide on Breeding Poison Dart Frogs.

Natural Range: Dendrobates tinctorius 'Cobalt' is native to Suriname. An exact locale is questionable - it is very likely that frogs have been imported under the 'cobalt' name from different locales in Suriname.

History in the Hobby: Cobalts have been around for a very long time in the US hobby, having originally been imported in the 1990s. While an exact locale is not known, this has long been a popular frog in the hobby.

Links of Interest:
Tinctorius Morphguide, with great information on all morphs of Dendrobates tinctorius.
IUCN Redlist article on Dendrobates tinctorius.

Still not sure if Dendrobates tinctorius 'Cobalt' from Josh's Frogs are the right poison dart frog for you? Read the reviews below and see what other customers are saying!


After placing your order someone from our care team will reach out to schedule delivery of this product.

Other Customers Also Bought

Fresh Mood Moss (1 Quart)
Fresh Mood Moss (1 Quart)

4.7 out of 5 stars



Dwarf Tropical White Isopods (25 ct)
Dwarf Tropical White Isopods (25 ct)

4.9 out of 5 stars



Save 13% Zoo Med Nano Basking Spot Lamp (40 Watts)
Zoo Med Nano Basking Spot Lamp (40 Watts)

0.0 out of 5 stars




Out of Stock Rice Flour Beetle Media Sifter
Rice Flour Beetle Media Sifter

3.0 out of 5 stars



Out of Stock Josh's Frogs RICE Flour Beetle Culture (16 oz)
Featured Temperate Springtail (Collembola) Culture (32 oz)
Excelsior (makes 20 fruit fly cultures)
Excelsior (makes 20 fruit fly cultures)

4.9 out of 5 stars



Out of Stock Pinhead Banded Crickets (1000 Count)
Pinhead Banded Crickets (1000 Count)

0.0 out of 5 stars



Josh's Frogs Bioactive Booster (4.25 oz)
Josh's Frogs Bioactive Booster (4.25 oz)

5.0 out of 5 stars



Customer Reviews

5.0 out of 5 stars

Based on 2 reviews

Review data

5 star reviews


4 star reviews


3 star reviews


2 star reviews


1 star reviews




5.0 out of 5 stars


I have had a pair of these cobalts for about three years now and they have been very active breeders for the last two years. I bought them as babies and was lucky enough that they became a mated pair. they are so fun to watch and I have started to let the eggs stay in the vivarium and have seen the male take his tadpoles to the water bowl several times and these babies have become frogs in the tank with the parents. They have been so exciting to watch!

Page Frogs

5.0 out of 5 stars

Arrived Safely

My frogs arrived safely - despite FedEx's attitude. I'm so happy to welcome these 5 babies into my Page Frog family. Thank you Josh's Frogs for being amazing. I'm a novice, but you are helping me grow!

Showing 1 to 2 of 2 results