Yes it's ugly, Yes it smells like fish but it has infinite uses. If you have a tamed an angler said angler will attract more anglers which you can harvest jel from. The jel is used to tame one of my personal favorites the mighty manta. Anglers can be strong but are no match for a well rounded megaladon. Hope this helps ;).
"Hey I'm going on a pearl run, anyone wanna play bodyguard?"
Are you going to bite ammonites this time?"
"Told you it wasn't on purpose"
"Alright alright I'll go lemme get some scuba and I'll hop on the mosa"
Ten minutes later my tribemate is having to save me from two mosas, an alpha mosa, 50 anglers, 20 eels, 7 plesies all in one area
"STOP BITING THE AMMONITES"
"IT WAS AN ACCIDENT! they hide in the reefs and I hit them if they happen to be by a pearl patch! :'( "
Want infinite fuel?
1. Get yourself a simple underwater tame like a meg
2. Kill anglers for gel
3. Store and keep burning in standing torches or refinery
( STANDING AND WALL TORCHES BURN BLUE)
I collect this with a plesiosaur and can burn 700 metal with just 30. Lucky I collected 5000