If you were to want a fight with Rhynio like push them out of your territories or smth. Use a dino with high stamina and health and speed, even battle if you got high damage.

What? Sounds obvious? Well that’s fact, without those you simply got no chance, bye bye human rights, absolute humiliated.

Never think of using a Pteranodon, you just gonna be humiliated in that case

Only fight with Rhynio when it’s land and use it’s claw to attack you

DO NOT, stand still or be close when it’s start shooting it’s lava looking resin.

The Rhynio can chase you like forever, and their speed? Just like a pteranodon sprinting, so avoid the swamp if you don’t have the suitable way to deal with meeting Rhynio

You can use a net attachment on the harpoon and a magnifying glass to keep an eye on its health, noting it gives you up to 30secs, a dire wolf could also work, but the other option is much cheaper, be sure to have decent weapons to chip it health down below 10% like you'd do with the Reaper Queens

I never tamed one but a good way to tame it is to shoot a chain bolla at it and then you can just trap it in stone gate ways and let your firearms do the rest.Once it’s low bolla it again let it free,use a brontosaurus and make it eat the pheromone then it should impregnate your brontosaurus.Recommend killing it after because sometimes it comes back for you.

So what you wanna do is kill a male or something and then get its pheromone and put it in like a big dinosaur and then a female Rhyniognatha will lay a egg inside that dino with the pheromone and the baby will burst out of the dino (and yeah ur dino is dead you no longer have it) and you have to raise and take care of the baby Rhyniognatha. I hope this helped.

-TherizinosaurusGurl

For Ark ultimate mobile edition player:

I tamed two rhyniognatha.

#First Implantation

Host Creature: Bronto

Host Level: 253

Host Health: 43,499

Rhyniognatha Level Used: 135

Resulting Baby Level: 176

Resulting Baby Health: 7,588

# Second Implantation

Host Creature: Bronto

Host Level: 234

Host Health: 34,832

Rhyniognatha Level Used: 125

Resulting Baby Level: 158

Resulting Baby Health: 9,016

My first brontod craving were - gasoline, achitina paste, 2 fria curry.

My second brontos carving were. - 2 carcha eggs, 1 exceptional kibble, ammonite bile, caline stew.

I think the craving matters for good stats.

If you can’t find a Rhyniognatha, its not that they aren’t in your game, from another comment I have seen. They have rare spawns like the Carchar and Giga and require you to clear out the area (The swamp on the Island, and same thing with Lost Island) to find them, and then wait at least an hour for them to spawn.

— J133

In my experience, my impregnated creature would not eat food on its own while I was away on another map gathering things for its cravings, or when I logged out even if the food was in its inventory. I had to force feed it to get it back to full. However, while I was there on The Island it would eat on its own. Just a heads up!

Some tips I'm going from my experiences today.

Take a Fob to defend yourself (Heavy and generator boxed up) while incubation happens

Have everything pre-made that it can ask for

Have a sinomacrops for the quicker perishables such as honey

Someone already posted a list of possible cravings, kudos.

Net gun is a must net whatever the female is fighting and then net her, kill off all distractions/threats then damage her

Use an assault rife and magnifying glass to gauge her health