 Nocturnal in habits , the tawny nurse shark tends to spend the day resting in piles of two dozen or more individuals inside caves or under ledges . At night , it is an active @-@ swimming predator that uses a powerful suction force to extract prey from inside holes and crevices . The diet of this species consists mainly of octopus , though they also take other invertebrates , small bony fishes , and rarely sea snakes . It is aplacental viviparous , meaning the embryos hatch from egg capsules inside the mother . It is the only carpet shark in which the embryos are oophagous , feeding on eggs produced by the mother while inside the uterus . The litter size may be as small as one or two , based on the large size of near @-@ term embryos . 
 Nocturnal in habits , the tawny nurse shark <a href='uninflect' title='1'><mark>tends</mark></a> to spend the day resting in piles of two dozen or more individuals inside caves or under ledges . At night , it <a href='drop_aux' title='2'><mark>is</mark></a>an active @-@ swimming predator <a href='null_relcl' title='3'><mark>that</mark></a><a href='uninflect' title='4'><mark>uses</mark></a> a powerful suction force to extract prey from inside holes and crevices . The diet of this species <a href='uninflect' title='5'><mark>consists</mark></a> mainly of octopus , though they also take other invertebrates , small bony fishes , and rarely sea snakes . It <a href='drop_aux' title='6'><mark>is</mark></a>aplacental viviparous , meaning the embryos hatch from egg capsules inside the mother . It <a href='drop_aux' title='7'><mark>is</mark></a>the only carpet shark in which the embryos <a href='drop_aux' title='8'><mark>are</mark></a>oophagous , feeding on eggs produced by the mother while inside the uterus . The litter size may be as small as one or two , based on the large size of near @-@ term embryos . 
Nocturnal in habits , the tawny nurse shark tend to spend da day resting in piles of two dozen or more individuals inside caves or under ledges . At night , it an active @-@ swimmin predator use a powerful suction force to extract prey from inside holes and crevices . Tdadiet of this species consist mainly of octopus , though they also take other invertebrates , small bony fishes , and rarely sea snakes . It aplacental viviparous , meaning thdambryos hatch from egg capsules inside the mother . It thedaly carpet shark in which the embryos oophagous , feeding on eggs produced by the mother while inside the uterus . The dater size may b as small as one or two , based on the ldae size of near @-@ term embryos .