Few examples of large Lanian marine life. The ships there are for size reference.

The smallest on the page also comes in a smaller size; around grizzly bear size, the one pictured is just huge.

(copypasta from a comment)

Mr.Black and Yellow is an ambush predator. The jaw can be covered up by the skin around it; it has patterns similar to the plant life along the ocean floor. They stay half submerged and snap at anything that comes along. Some of them however get a little antsy and start writhing around the surface jumping out and catching low flying critters. They are insanely dangerous but the HUGE ones like the one pictured here are pretty rare. There are different types of them that get a little smaller. They also prey on the larger middle critter there.

The long necked one uses the little tubes that make up its mouth to siphon small plankton like things and algae. They are very slow moving and it is a little daunting to see them break the surface because of how huge they are. The fins near their tails identify male or female and different individuals. They are friendly but they are targeted by a lot of predators. They have regenerative abilities but it takes up a lot of energy; so injured ones dive to the bottom of the ocean and go into a type of hibernation mode.

Fluffy down there is pretty lazy most of the time but they eat a LOT in one sitting...so they can be even more lazy later. The tentacles along their necks have little venomous barbs at the tip *you can kind of see them exposed in the picture* so they wrangle things in water or on the surface; only using the barbs on bigger things. They are only semi aquatic so when they hunt on land they usually barb things and track them for awhile until the prey dies. They also just generally claw things to death and can move quickly if they want to but only for a short amount of time; so it's good they have tentacles as an option haha. Some people also use the smaller ones as hunting companions and mounts. Most of the creatures in Laynair have a fair amount of intelligence measured by a system they call S.I (social intelligence) which factors in how well a creature can communicate with races and species other than it's own. These guys can give signals to the main races so they are decently high on the S.I scale.