More than 35 years later, Bdellovibrio biology is undergoing a revival owing to the original, pioneering genetics work of Thomashow and colleagues (13), which has been followed up by genome sequencing and the development of new gene inactivation methods to study the function of these bacteria (32, 42, 60).
They also have five pairs of eyes. The Freshwater Leech is a parasite that feeds on the blood of fish, frogs, turtles, and mammals. It should not be confused with other leeches, most of which prey only on insects, snails, and small creatures.
All frogs have a sexual reproduction. Most frogs fertilize their eggs external, like the poison dart frogs, only some species are known to have an internal fertilization, eg (Ascaphus).f that's the case,  you can get nausea, hallucinations, and all kind of other side  effects. The most poisonous frog contains enough poison to kill 50  people, and uses a neurotoxin. Poison dart frogs have a nerve poison in their skin that causes paralysis.