A breeding pair can be *very* useful, especially when playing alone with adapted settings. Eggs can be used to turn into oil, the offspring can be used to get organic polymer. Breed, keep the females to produce even more eggs, turn eggs into oil and the boys into polymer. They are also a shoulder mount, can one-hit any fish (100.000.000 damage), and they *only* eat fish. I recommend a pelagornis for getting all the fish meat needed. They might also produce golden eggs when eating freshly killed fish. Overall, pretty useful.

The taming process can be a bit tedious though. But, they are easily trapped, if there is a dead fish laying around, they will run towards it and just stare at it.

Hope this helps!