Spider Climb The acromantula can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check. 

Web Sense While in contact with the web, the acromantula knows the exact location of any other creature in contact with the web.

Web Walker The acromantula ignores movement restrictions caused by webbing.

Action Name. Enter the description for your action.

bite. Melee Weapon Attack: +10 to hit, reach 20 ft., 1 target. Hit: 20 (2d12 + 5) Slashing damage and 17(2d10+3) poison damage. 

Web( recharge 4-5) RangedWeapon Attack: +10 to hit, range 60/120 ft., one target is restrained by webbing. As an action the target can make a DC 19 strength check, bursting the webbing on a success. The webbing can also be attacked and destroyed (AC 20; hp 10; vulnerability to fire damage; immunity to bludgeoning, poison, and psychic damage.