Please add some of the following, or variations of them.
Jelly Fish - Dangerous, can be used for poisons and glowing goop related materials.
Sea Turtles - Meat/hide and shields can be made from turtles
Sharks - Teeth can be used to modify weapons, or make arrows. Hide can be used for armor.
Piranha - Dangerous, Don’t swim where the water is frothy.
Giant Clams - Large Amount of meat, rare, has a valuable pearl (and other trinkets it has collected over the years) ((mini chest))
Large Fish (Grouper/Moon Fish) - Large amount of meat, hide, bones.
Whales - Beached, can be harvested for rotten meat, hide, bone, blood and random items in their gut.
Sea Urchin/Star Fish - Can be harvested, small amount of meat.
Seals/Dolphins - Curious, come to you but are non-aggressive. Convenient source of meat/immersive.