Soo easy to meat run just hit 1 of these with a squid and eat the whole ocean black caped squid in 10 min meat run done

Use ark.gamepedia.com to find just about everything you need to know about these guys, including where they can be found on each map (Search bar top right corner).

If you do choose to kill it the ammonite will actually drop black pearls if harvested with a megalodon with decent melee.

If you want to kill it. I suggest you have a fleet of baronyxes and/or sharks under your command. Especially if there are eels or mosasaurs nearby.

Used to make pheromone darts, which aggro enemy dinos against their tames.

Way to collect black pearls
1. Get a good scuba tank, crossbow (and arrows obviously) and ascendant pick
2. Get a water mount (Plesio,Meg,ichty)
3. Circle the ocean, stay at the bottom and keep killing ammonites and eurypterid with crossbow and harvest with pick until you find alpha mosasaur.

Their ammonite bile can’t be put in fridges. I found that out the hard way...

This creature could be used to up a already really powerful sea creature by utilizing its distresss, call. 1: hit it 2: get out your sea creature, 3: get out you frogz 4: forget actually getting ready for this 5: drop your tribe mate into the action (with handcuffs) 6: wait for the creatures to leave, steal his stuff

They seem as though they are the spaghetti of the sea. Not to soft, delicious, important, and you should not mess with it.