Physical description: 

• Length : Males are 6 to 6.5 cm or 2.0 to 2.5 inches 
• Length : Females are 8.5 cm to 10.5 cm or 3.0 to 4.0 inches
• Color : Males are dull yellow orange 
• Color : Females are solid bright red/orange with some shadesof white
• Both Male & Female have a yellowish underside and sometimesshow black on their throats
• Toxic Level : Both Male & Female give out a whitish skin secretion which is used for defense against predators
• Toxin can occasionally cause allergic reactions in humans

General information:

The Madagascan Tomato Frog is found only in Madagascar and there they are limited to the northwestern part of the island.
Adults are fairly large as you can see from the dimensions provided above, sometimes as big as a person's fist. Now that is pretty large for a frog !!
The interesting thing about Tomato Frogs is, that the male is quite a bit smaller then the female, actually about only one third in size compared to the female. Another interesting fact is that the male is not as bright in coloration as the female and is showing only a dull orange or brownish-orange instead of the reddish-orange found in females.
As Juveniles, both the female and male Tomato Frog are dull in color and only develop their individual coloration as they mature and utilize this coloration as a warning mechanism. Would you approach someome you don't know, that is colored bright red and exudes a sticky white, irritating mucus ? Not me ! Well, there you have it, the warning mechanism seems to work just fine !
 

Comments about the Madagascan Tomato Frog:

The Madagascan Tomato Frog ( Dyscophus antongilii ) recently has been listed on Appendix I of the Convention on International Trade in Endangered Species, also referred to as CITES.
The main reason for its listing is the dramatic deforestation in Madagascar and unfortunately the worldwide trade of this species across the globe. The captive population ( registered ) in U.S. Zoos currently stands at 101 adult specimens at 21 institutions and remains at a critical level and high priority on the AZA ( Amphibian Taxon Advisory Group.

Personal Observations at the Forth WorthZoo :

The Tomato Frog is very interesting to observe, as it rarely moves; occasionally blinks ( if you are lucky and  v e r y patient ) and as mentioned earlier feeds by literally stalking its prey. I was informed by the zoo keepers, that is is very difficult to make the little guy happy, as they require both the right temperature and humidity levels, to feel right at home.