DREDGE

There are now 151 different varieties of underwater fauna you will need to find throughout the bse game in order to fill your Encyclopedia. 67 of those creatures are the known species of fish you will need for Master Angler . The other 84 are Aberrations of those species, with ten of these being added in the Dredge Update 2 on 6 July 2023 and another 13 crab pot aberrations added in Update 3 on 18 September 2023.
 

There are seven different rod types and the type of rod usually will coincide with the environment (Shallow for skimpier pools of water, Oceanic for large catches in the open ocean, Abyssal and Hadal rods for truly deep fishing, Mangrove for the murky swamps of Twisted Strand, Volcanic for the steamy Devil's Spine) Not all of these rods will be available through research and purchase alone, so if you are stuck on the ability to snag a type, make sure you are talking to NPCs and fulfilling the Pursuits you are given.

You will need to find 84 aberrated versions of the fauna you found for Master Angler  throughout the five regions and the open waters in between them. Below is a list of species by region and rod type, as well as if the species is only found at night/day. The Aurora Jellyfish (Coastal), and Anchovy (Oceanic) aberrations can still only be caught through Trawl Net, but Patch 1.1.0 has now implemented a doubled chance to catch these two aberrations

There is one useful ability that can make much of this collection easier: Whenever you use Atrophy on a fishing spot, you are guaranteed to receive at least one aberration of that species. Atrophy does have a cooldown of 12 hours, so use it accordingly to your best benefit.

Added with Update 3, your boat now has an Aberration Bonus Percentage. This can be raised by using Eldrich fishing tools such as the Rods you receive from the Fish Shrines (see Servant of the Shrines ) and the Sign of Ruin from the Blackstone Isle DLC if you own that item. 

The Marrows

• Grotesque Mackrel - Coastal (Day)
• Lumpy Mackerel - Coastal (Day)
• Many-Eyed Mackerel - Coastal (Day)
• All-Seeing Cod - Coastal (Day)
• Fanged Cod - Coastal (Day)
• Three-Headed Cod - Coastal (Day)
• Brood Squid - Coastal (Night)
• Snag Squid - Coastal (Night)
• Barbed Eel - Shallow
• Host Eel - Shallow
• Cyclopean Flounder - Shallow (Day)
• Riddled Flounder - Shallow (Day)
• Tusked Grouper - Shallow (Night)
• Voltaic Grouper - Shallow (Night)
• Shard Ray - Shallow
• Sallow Sailfish - Oceanic (Day)
• Hooked Sailfish - Oceanic (Day) [Added in Update 2]
• Bloodskin Shark - Oceanic (Day)
• Cleft-mouth Shark - Oceanic (Night)
• Cerebral Crab [Crab Pot] [Added in Update 3]
• Malignant Pincher [Crab Pot] [Added in Update 3]

Gale Cliffs

• Gnashing Perch - Coastal (Day)
• Flayed Mackerel - Coastal (Day)
• Bearded Mackerel - Coastal (Day)
• Scouring Bass - Coastal (Night)
• Gelatinous Stonefish - Shallow 
• Enthralled Stonefish - Shallow [Added in Update 2]
• Decaying Blackmouth - Coastal
• Sprouting Eel - Shallow (Night)
• Withered Ray - Oceanic (Night)
• Translucent Sturgeon - Oceanic (Day)
• Shattered Wreckfish - Shallow (Day)
• Bony Wreckfish - Shallow (Day)
• Splintered Crab [Crab Pot] [Added in Update 3]
• Cortex Decorator [Crab Pot] [Added in Update 3]

Stellar Basin

• Parhelion Jellyfish - Coastal (Night) [Trawl Only]
• Cursed Fangtooth - Abyssal
• Voideye - Abyssal
• Radiant Squid - Coastal (Night)
• Blood Snapper - Coastal (Day)
• Latching Snapper - Coastal (Day) [Added in Update 2]
• Ruptured Vessel - Hadal
• Perished Loosejaw - Abyssal
• Calcified Snailfish - Hadal
• Seizing Snailfish - Hadal  [Added in Update 2]
• Consumed Grouper - Shallow (Day)
• Medusa Octopus - Shallow (Night)
• Bursting Anglerfish - Abyssal 
• Savage Barracuda - Shallow (Day)
• Concertina Barracuda - Shallow (Day)  [Added in Update 2]
• Gazing Shark - Oceanic
• Crown of Nadir [Crab Pot] [Added in Update 3]
• Entangled Crab [Crab Pot] [Added in Update 3]
• Imperious Lobster [Crab Pot] [Added in Update 3]

Twisted Strand

• Entwined Mullet - Coastal
• Gleamng Mullet - Coastal  [Added in Update 2]
• Blistered Tarpon - Shallow
• Vortex Interloper - Mangrove (Day)
• Clawfin Gar - Mangrove (Day)
• Grinning Gar - Mangrove (Day) [Added in Update 2]
• Twinned Eel - Mangrove (Night)
• Nightwing Catfish - Mangrove (Night)
• Effigy Crab [Crab Pot] [Added in Update 3]
• Mire Screecher [Crab Pot] [Added in Update 3]

Devil's Spine

• Ossified Searobin - Shallow (Day)
• Infernal Eel - Volcanic (Night)
• Serpentine Mackerel - Coastal
• Tattered Mackerel - Coastal [Added in Update 2]
• Defaced Skate - Volcanic (Day)
• Rapt Shark - Abyssal
• Twisted Shark - Volcanic
• Grasping Snail [Crab Pot] [Added in Update 3]
• Sable Reacher [Crab Pot] [Added in Update 3]
• Umbral Puppet [Crab Pot] [Added in Update 3]

Open Ocean (This is the ocean areas in between the five regions)

• Anchovy King - Oceanic [Trawl Only]
• Razormouth Tuna - Oceanic 
• Decrepit Viperfish - Abyssal
• Collapsed Viperfish - Abyssal
• Skeletal Moonfish - Oceanic (Night)
• Beaked Moonfish - Oceanic (Night) [Added in Update 2]
• Congealed Rattail - Hadal
• Charred Sunfish - Oceanic (Day)
• Glaring Sunfish - Oceanic (Day) [Added in Update 2]
• Leeching Prawn - Oceanic [Trawl or Crab Pot] [Added in Update 3]

It is advised you obtain this trophy before adding The Pale Reach DLC to your game. This content adds a new area to your map, 11 new fish variations, 13 new aberrations and five new docks to the full tally of the game. Adversely, The Pale Reach does reward you with two new items that increase your Aberration Bonus Percentage, so it balances out in the end. If you require the new Pale Reach aberrations for this trophy, please check the guide in Cold Corruptions  for those additions