african red knob sea star in closeup, tropical ornamental aquarium pet, starfish specie from the indo-pacific ocean

africa africimal animals aquarium background bottom closeup colorful dweller dwelling exotic fish fishes gray ground indo indopacific knob knobbed life linckii marine ocean oreasteridae ornamental pacific protoreaster red reef reefs sea specie species spine spined spiny star starfish starfishes stars trade tropical tubercle tubercles underwater vibrant vivid water white