They do not have a lateral line but at least some have a lateral line analogue, the epidermal head lines, that are compromised of mechanosensory hair cells and detect water displacement (Budelmann & Bleckmann 1988, J Comp Physiol A)
The lateral line belongs to the lateral line system. This helps to stream line fish in water and to keep them afloat.
Lateral line system means an aquatic organs sense system found in fish
The lateral line is a sense organ found in fish. It uses hair cells to detect movement and vibration in the surrounding water.
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The fins of a vampire squid serve as its primary means of propulsion. A vampire squid 'flies' through the water by flapping its pair of small fins projecting from the lateral sides of the mantle.
lateral line is a line on the fish body that function to detect vibrations in water
The lateral line of a shark is a series of small sensory pores that run along each side of the fish, typically from head to tail. These pores allow sharks to detect changes in water pressure and vibrations in their surroundings, helping them locate prey and navigate their environment.
Amphibians like frogs and salamanders also have a lateral line system, which helps them to detect movement and changes in water pressure in their aquatic environment. Some invertebrates like crayfish and certain insects also have a lateral line system for sensing vibrations in water.
A squid is a male if it has a small penis just posterior and lateral to the gill heart. A squid is a female if it has eggs in the gonad, located in the mantle. These eggs are produces in the ovary, which extends posteriorly from the gill hearts to the posterior tip of the mantle. Hope this helps!
Lateral Line.