Here is the full list of all 36 MONSTER OF THE DEEP: FINAL FANTASY XV trophies - there are 21 bronze, 10 silver, 4 gold and 1 platinum.
Collected all trophies.
Caught all fish at Rachsia Bridge.
Caught one of every fish.
Caught all fish at the Caem Shore.
Caught all fish at Crestholm Reservoir.
Caught all fish at the Vesperpool.
Caught all fish at the Forgotten Pool.
Caught all fish at Neeglyss Pond.
Hooked some garbage.
Hooked an unidentified species.
Collected all tackle.
Collected all reels.
Collected all rods.
Reached Hunter Rank 10.
Caught 255 fish.
Reached Hunter Rank 5.
Collected all lures.
Caught 100 fish.
Spent 10,000 gil on tackle.
Caught 50 fish.
Completed your first hunt.
Decorated your cabin for the first time.
Caught the bythos.
Caught the krypse.
Caught the isonade.
Caught the vrorogo.
Caught the deinosaulma.
Bought your first tackle.
Participated in your first tournament.
Caught the lattomaratos.
Caught the ypodochth.
Caught a whopper.
Lost your first whopper.
Completed the prologue.
Performed your first excellent cast.
Caught your first fish.