1)Jaguar
Jaguars are pretty small cats and anacondas are large. It really depends on who gets the drop on who. On land, if a jaguar sees an anaconda slithering around and jumps onto it, the jaguar will probably win. If a jaguar is drinking from a river and an anaconda strikes at it, the anaconda will win.
2)Nile crocodile
Well as you can see, even though anacondas have preyed on caimans, the crocodile is much larger, and likely too big for the anaconda to eat. ... Its smaller relative the Nile crocodile, which also has a weaker bite than a saltwater, has been known to kill animals much larger than an anaconda.
3)Caiman
The green anaconda has a maximum weight of estimated 500 lbs which may be a little over estimated but black caiman can easily reach more than 1000 lbs. So, the anaconda will kill the caiman if its a spectacled one. But against a full grown black caiman, the anaconda stands no chance.
Eat and be eaten: Caimans range from apex predators to dinner for anacondas. As carnivorous reptiles, caimans eat a variety of other species. All caimans eat fish and small animals, but the larger species can even hunt python,anaconda or jaguars!