The heart fish is a commonly encountered on low levels fish the posses zero threat to you unless there are other monsters nearby heart fishes only attack if you get to close making them feel threatened, as an act of self defense they will spray ink you can hide from. The ink will blind your screen for around 7 seconds
Threat level: 1
counter measures: avoiding, using emp.
often encountered: low levels.

Often annoying stealer which is often hated by many people axolotl looking creature may find you and try to steal your stuff, you can prevent that by punching them or tasing to temporary stop them
They usually put stolen stuff in so called "nests"
Threat level: 0
counter measures: hiting, stunning. dashing away.
Often encountered: middle / higher level.

This creature is preety common and slow as long as it's not close. It moves in dashes and attack by striking in a straight line and swinging it's "arms" they can be stunned and easily escapable if you got speed or you jsut dash.
Threat level 2
countermeasures: stunning (preferably with emp module), dashing. avoiding.
often encountered: low/middle level

This fish will make you pray there is not an open straight corridor ahead, the chainsaw fish is remotely fast and will pursue it's target and then try and dash them with a chainsaw. One thing about this fish is that if it noticed you - you will hear it, Stunning fish gives it speed and dmg boost, what i can recomend doing instead is going arond corners to avoid it.threat level: 3
counter measures: cutting corners, dashing.
often encountered: middle/high

Unfortunately i didn't mabnage to get a good photo of this fish, but they look pale and have a scary face. As the title suggest you msut scream or talk at this fish to scar it away otherwise it may oneshot you it also makes weird noises when it's close to you.
Threat level: 2/3
Counter measures: stunning, screamin and panicing.
Often found: middle/higher levels

This fish has 2 variations one with tongue and without, but they have 1 thing in common: they are big, will aproach you at slow speed, deal 60/80 damage, and if you teammate attack them they release you. Once the fish swallowed you just wait and it will throw you out, unless you die before that. If you have been swallowed try calling teammates for help (reccomended to have captain microphone module)
Threat level 2 / 3 (with tongue)
Counter measures: Avoiding, stunning (may not work out well without emp), dashing.

Leech common enemy yo umay find on low levels that will slowly drain 20% of you hp, and atatch to your arm, bt can be killed with laser cutter and stunned, or punched.
Threat level: 1.5
Counter measures: punching/attacking stunning,dashing.
Often found: low levels

This fish will only react to you if you make loud noise / talk, the fish has a bomb atatched to it and moves a little slwoer than you (if you dash). when you get close it explodessuprisingly this fish doesn't react to baits which are loud.
Threat level: 2
counter measures: avoiding.
Often found: middle

Steals light (was mistaken before)
Threat level: ?
counter measures: stunning, dashing.
Often found: middle/high level.

if they notice you they will try to escape and get you stars which is bad for you but easily killed by punching.
Threat level: 1.5
Counter measures: attacking.
Often found: middle/high level (could depend on how close police is.

If you look at it you will get cursed and you will start seeing tvs appearing on your screen potentially limiting your field of view, also may have other effect i am unaware of.
Threat level: 2 / ???
Counter measures: not looking.
Often found: middle/higher (or rare)

I do not know the name of this creature, but the thing about it is it is REALLY big and will 1 shot you on touch but is not aggressive and will often spawn in open space.
Please note that tentacles coming out of the back are still counted as part of the fish and posses major threat due to them actively moving as the fish swims.
Threat level: 2.5
Counter measures: being carefull, dashing.
Often encountered: middle/higher (or just rare)

As nsame suggest this enemy is scared of light, both natural and flashlight light (possibly glwostick light), Unfortunately no picture, preety small.
Threat level: 3
Counter measures: being in lighted up space, using flashlight, (possibly glowsticks).
Often found: higher

This lil bastard on their own posses no threat but same can't be said about their mom, there are ussually more than 1 spawning along with their mom so be careful when you dive. the babies are upset very easily a simple bump or a tap is enough to make them cry. this also applies for the emp and taser (and likely the cutting device).
when crying babies will make very loud noise (and somehow make tears under water) which will call their mom.
Threat level: 0.5
Counter measures: being careful
Often found: lower?

The mom is preety passive on her own and will not attack unless you touch her babies. getting very close will also trigger her but the animation lasts a couple of seconds so just slowly back away.
the mother on her own is faster than you so quickly get to the ship and hide, using emp is recommended. DO NOT try to tase the mom when you get close she will already be in the process of attack and will not be tased use EMP instead. after you get to the ship wait some time and mother will calm down.
Threat level: 2.5
Counter measures: EMP, being careful, setting your speed to 300%.
Often found: lower?

Special thanks to:

The creators of this game
for creating the game

King puro
for helping me with some old guide stuff like photos

that one guy who told me to update the guide
this kinda motivated me to get back to this

YOU
for reading this